JDK11 breaks incremental compilation

[akshaal]

Running maven with JDK11 triggers recompilation of all source files in project. When it happens, the following can be found in the mvn -X log:

[DEBUG] Invalidating '/modules/java.base/java/lang/Object.class' because could not find class java.lang.Object on the classpath.
...
Modified binary dependencies: Set(/modules/java.base/java/lang/Object.class)
...
Sources indirectly invalidated by:
	product: Set()
	binary dep: Set(/tmp/1/x/X.scala)
	external source: Set()
[DEBUG] all 1 sources are invalidated
[DEBUG] Initial set of included nodes: 
[DEBUG] Recompiling all sources: number of invalidated sources > 50.0% of all sources

If I use java 8 to compile the same project, then everything works fine, the plugin properly reports "[DEBUG] No changes". With java 11 it's quite random, but most often it just recompiles everything.

The test project consist of two files. pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>G</groupId>
    <artifactId>A</artifactId>
    <version>1.2.3-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
        
        <scala.version_major>2.13</scala.version_major>
        <scala.version>${scala.version_major}.8</scala.version>
        <scala-maven-plugin.version>4.6.1</scala-maven-plugin.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>${scala-maven-plugin.version}</version>
                <configuration>
                    <sourceDir>./</sourceDir>
                    <scalaVersion>${scala.version}</scalaVersion>
                    <recompileMode>incremental</recompileMode>
                </configuration>

                <executions>
                    <execution>
                        <id>add-source</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>add-source</goal>
                        </goals>
                    </execution>

                    <execution>
                        <id>compile-it</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

And an arbitrary scala class like x.scala:

object X

The given test project can be cloned from the gist:

git clone https://gist.github.com/akshaal/bb9f3ad253cc512064d978ccd9488027 test-project

java -version

openjdk version "11.0.15" 2022-04-19
OpenJDK Runtime Environment Temurin-11.0.15+10 (build 11.0.15+10)
OpenJDK 64-Bit Server VM Temurin-11.0.15+10 (build 11.0.15+10, mixed mode)

full trace for mvn -X compile:

mvn -X compile                                                                                                                                                                                          22:33:21 
OpenJDK 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0
Apache Maven 3.8.5 (3599d3414f046de2324203b78ddcf9b5e4388aa0)
Maven home: /opt/maven
Java version: 11.0.15, vendor: Eclipse Adoptium, runtime: /opt/jdk-11.0.15+10
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.13.0-40-generic", arch: "amd64", family: "unix"
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG]   Imported: javax.annotation.* < plexus.core
[DEBUG]   Imported: javax.annotation.security.* < plexus.core
[DEBUG]   Imported: javax.inject.* < plexus.core
[DEBUG]   Imported: org.apache.maven.* < plexus.core
[DEBUG]   Imported: org.apache.maven.artifact < plexus.core
[DEBUG]   Imported: org.apache.maven.classrealm < plexus.core
[DEBUG]   Imported: org.apache.maven.cli < plexus.core
[DEBUG]   Imported: org.apache.maven.configuration < plexus.core
[DEBUG]   Imported: org.apache.maven.exception < plexus.core
[DEBUG]   Imported: org.apache.maven.execution < plexus.core
[DEBUG]   Imported: org.apache.maven.execution.scope < plexus.core
[DEBUG]   Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG]   Imported: org.apache.maven.model < plexus.core
[DEBUG]   Imported: org.apache.maven.monitor < plexus.core
[DEBUG]   Imported: org.apache.maven.plugin < plexus.core
[DEBUG]   Imported: org.apache.maven.profiles < plexus.core
[DEBUG]   Imported: org.apache.maven.project < plexus.core
[DEBUG]   Imported: org.apache.maven.reporting < plexus.core
[DEBUG]   Imported: org.apache.maven.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG]   Imported: org.apache.maven.settings < plexus.core
[DEBUG]   Imported: org.apache.maven.toolchain < plexus.core
[DEBUG]   Imported: org.apache.maven.usability < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG]   Imported: org.codehaus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.* < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.component < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.container < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.context < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core
[DEBUG]   Imported: org.eclipse.aether.* < plexus.core
[DEBUG]   Imported: org.eclipse.aether.artifact < plexus.core
[DEBUG]   Imported: org.eclipse.aether.collection < plexus.core
[DEBUG]   Imported: org.eclipse.aether.deployment < plexus.core
[DEBUG]   Imported: org.eclipse.aether.graph < plexus.core
[DEBUG]   Imported: org.eclipse.aether.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.installation < plexus.core
[DEBUG]   Imported: org.eclipse.aether.internal.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.metadata < plexus.core
[DEBUG]   Imported: org.eclipse.aether.repository < plexus.core
[DEBUG]   Imported: org.eclipse.aether.resolution < plexus.core
[DEBUG]   Imported: org.eclipse.aether.spi < plexus.core
[DEBUG]   Imported: org.eclipse.aether.transfer < plexus.core
[DEBUG]   Imported: org.eclipse.aether.version < plexus.core
[DEBUG]   Imported: org.fusesource.jansi.* < plexus.core
[DEBUG]   Imported: org.slf4j.* < plexus.core
[DEBUG]   Imported: org.slf4j.event.* < plexus.core
[DEBUG]   Imported: org.slf4j.helpers.* < plexus.core
[DEBUG]   Imported: org.slf4j.spi.* < plexus.core
[DEBUG] Populating class realm maven.api
[INFO] Error stacktraces are turned on.
[DEBUG] Message scheme: color
[DEBUG] Message styles: debug info warning error success failure strong mojo project
[DEBUG] Reading global settings from /opt/maven/conf/settings.xml
[DEBUG] Reading user settings from /home/user/.m2/settings.xml
[DEBUG] Reading global toolchains from /opt/maven/conf/toolchains.xml
[DEBUG] Reading user toolchains from /home/user/.m2/toolchains.xml
[DEBUG] Using local repository at /home/user/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for /home/user/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project G:A:jar:1.2.3-SNAPSHOT: (none)
[DEBUG] Looking up lifecycle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: G:A:jar:1.2.3-SNAPSHOT
[DEBUG] Tasks:   [compile]
[DEBUG] Style:   Regular
[DEBUG] =======================================================================
[INFO] 
[INFO] --------------------------------< G:A >---------------------------------
[INFO] Building A 1.2.3-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for apache.snapshots (http://repository.apache.org/snapshots).
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] === PROJECT BUILD PLAN ================================================
[DEBUG] Project:       G:A:1.2.3-SNAPSHOT
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): [compile]
[DEBUG] Repositories (dependencies): [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] Repositories (plugins)     : [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          net.alchim31.maven:scala-maven-plugin:4.6.1:add-source (add-source)
[DEBUG] Style:         Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <project>${project}</project>
  <sourceDir default-value="${project.build.sourceDirectory}/../scala">./</sourceDir>
  <testSourceDir default-value="${project.build.testSourceDirectory}/../scala"/>
  <useCanonicalPath default-value="true">${maven.scala.useCanonicalPath}</useCanonicalPath>
</configuration>
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          org.apache.maven.plugins:maven-resources-plugin:2.6:resources (default-resources)
[DEBUG] Style:         Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <buildFilters default-value="${project.build.filters}"/>
  <encoding default-value="${project.build.sourceEncoding}">${encoding}</encoding>
  <escapeString>${maven.resources.escapeString}</escapeString>
  <escapeWindowsPaths default-value="true">${maven.resources.escapeWindowsPaths}</escapeWindowsPaths>
  <includeEmptyDirs default-value="false">${maven.resources.includeEmptyDirs}</includeEmptyDirs>
  <outputDirectory default-value="${project.build.outputDirectory}"/>
  <overwrite default-value="false">${maven.resources.overwrite}</overwrite>
  <project default-value="${project}"/>
  <resources default-value="${project.resources}"/>
  <session default-value="${session}"/>
  <supportMultiLineFiltering default-value="false">${maven.resources.supportMultiLineFiltering}</supportMultiLineFiltering>
  <useBuildFilters default-value="true"/>
  <useDefaultDelimiters default-value="true"/>
</configuration>
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          net.alchim31.maven:scala-maven-plugin:4.6.1:compile (compile-it)
[DEBUG] Style:         Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <addJavacArgs>${addJavacArgs}</addJavacArgs>
  <addScalacArgs>${addScalacArgs}</addScalacArgs>
  <additionalDependencies>${additionalDependencies}</additionalDependencies>
  <analysisCacheFile default-value="${project.build.directory}/analysis/compile">${analysisCacheFile}</analysisCacheFile>
  <checkMultipleScalaVersions default-value="true">${maven.scala.checkConsistency}</checkMultipleScalaVersions>
  <classpath>${classpath}</classpath>
  <compileOrder default-value="Mixed">${compileOrder}</compileOrder>
  <displayCmd default-value="false">${displayCmd}</displayCmd>
  <encoding default-value="UTF-8">${project.build.sourceEncoding}</encoding>
  <failOnMultipleScalaVersions default-value="false"/>
  <forceUseArgFile default-value="false"/>
  <fork default-value="true"/>
  <javacArgs>${javacArgs}</javacArgs>
  <javacGenerateDebugSymbols default-value="true">${javacGenerateDebugSymbols}</javacGenerateDebugSymbols>
  <notifyCompilation default-value="true">${notifyCompilation}</notifyCompilation>
  <outputDir default-value="${project.build.outputDirectory}">${outputDir}</outputDir>
  <pluginArtifacts default-value="${plugin.artifacts}"/>
  <project>${project}</project>
  <recompileMode default-value="incremental">incremental</recompileMode>
  <release>${maven.compiler.release}</release>
  <scalaClassName>${maven.scala.className}</scalaClassName>
  <scalaCompatVersion>${scala.compat.version}</scalaCompatVersion>
  <scalaHome>${scala.home}</scalaHome>
  <scalaOrganization default-value="org.scala-lang">${scala.organization}</scalaOrganization>
  <scalaVersion>2.13.8</scalaVersion>
  <secondaryCacheDir>${secondaryCacheDir}</secondaryCacheDir>
  <sendJavaToScalac default-value="true"/>
  <session>${session}</session>
  <skipMain>${maven.main.skip}</skipMain>
  <source>${maven.compiler.source}</source>
  <sourceDir default-value="${project.build.sourceDirectory}/../scala">./</sourceDir>
  <target>${maven.compiler.target}</target>
  <useCanonicalPath default-value="true">${maven.scala.useCanonicalPath}</useCanonicalPath>
</configuration>
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
[DEBUG] Style:         Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <basedir default-value="${basedir}"/>
  <buildDirectory default-value="${project.build.directory}"/>
  <classpathElements default-value="${project.compileClasspathElements}"/>
  <compileSourceRoots default-value="${project.compileSourceRoots}"/>
  <compilerId default-value="javac">${maven.compiler.compilerId}</compilerId>
  <compilerReuseStrategy default-value="${reuseCreated}">${maven.compiler.compilerReuseStrategy}</compilerReuseStrategy>
  <compilerVersion>${maven.compiler.compilerVersion}</compilerVersion>
  <debug default-value="true">${maven.compiler.debug}</debug>
  <debuglevel>${maven.compiler.debuglevel}</debuglevel>
  <encoding default-value="${project.build.sourceEncoding}">${encoding}</encoding>
  <executable>${maven.compiler.executable}</executable>
  <failOnError default-value="true">${maven.compiler.failOnError}</failOnError>
  <forceJavacCompilerUse default-value="false">${maven.compiler.forceJavacCompilerUse}</forceJavacCompilerUse>
  <fork default-value="false">${maven.compiler.fork}</fork>
  <generatedSourcesDirectory default-value="${project.build.directory}/generated-sources/annotations"/>
  <maxmem>${maven.compiler.maxmem}</maxmem>
  <meminitial>${maven.compiler.meminitial}</meminitial>
  <mojoExecution>${mojoExecution}</mojoExecution>
  <optimize default-value="false">${maven.compiler.optimize}</optimize>
  <outputDirectory default-value="${project.build.outputDirectory}"/>
  <projectArtifact default-value="${project.artifact}"/>
  <showDeprecation default-value="false">${maven.compiler.showDeprecation}</showDeprecation>
  <showWarnings default-value="false">${maven.compiler.showWarnings}</showWarnings>
  <skipMain>${maven.main.skip}</skipMain>
  <skipMultiThreadWarning default-value="false">${maven.compiler.skipMultiThreadWarning}</skipMultiThreadWarning>
  <source default-value="1.5">${maven.compiler.source}</source>
  <staleMillis default-value="0">${lastModGranularityMs}</staleMillis>
  <target default-value="1.5">${maven.compiler.target}</target>
  <useIncrementalCompilation default-value="true">${maven.compiler.useIncrementalCompilation}</useIncrementalCompilation>
  <verbose default-value="false">${maven.compiler.verbose}</verbose>
  <mavenSession default-value="${session}"/>
  <session default-value="${session}"/>
</configuration>
[DEBUG] =======================================================================
[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=50882, ConflictMarker.markTime=237926, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=27156, ConflictIdSorter.topsortTime=491179, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1297117, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=222495, DefaultDependencyCollector.transformTime=3665894}
[DEBUG] G:A:jar:1.2.3-SNAPSHOT
[INFO] 
[INFO] --- scala-maven-plugin:4.6.1:add-source (add-source) @ A ---
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for codehaus.snapshots (http://snapshots.repository.codehaus.org).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for apache.snapshots (http://people.apache.org/repo/m2-snapshot-repository).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for repository.jboss.org (http://repository.jboss.org/maven2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for snapshots.jboss.org (http://snapshots.jboss.org/maven2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for oss.sonatype.org/jboss-snapshots (http://oss.sonatype.org/content/repositories/jboss-snapshots).
[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=1158238, ConflictMarker.markTime=401752, ConflictMarker.nodeCount=224, ConflictIdSorter.graphTime=344556, ConflictIdSorter.topsortTime=68622, ConflictIdSorter.conflictIdCount=76, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=6021203, ConflictResolver.conflictItemCount=156, DefaultDependencyCollector.collectTime=279112888, DefaultDependencyCollector.transformTime=8079883}
[DEBUG] net.alchim31.maven:scala-maven-plugin:jar:4.6.1
[DEBUG]    org.apache.maven.shared:maven-dependency-tree:jar:3.1.0:compile
[DEBUG]       org.apache.maven:maven-core:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-settings:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-settings-builder:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-repository-metadata:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-plugin-api:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-model-builder:jar:3.0.5:compile
[DEBUG]          org.apache.maven:maven-aether-provider:jar:3.0.5:compile
[DEBUG]             org.sonatype.aether:aether-spi:jar:1.13.1:compile
[DEBUG]          org.sonatype.aether:aether-impl:jar:1.13.1:compile
[DEBUG]          org.sonatype.aether:aether-api:jar:1.13.1:compile
[DEBUG]          org.sonatype.aether:aether-util:jar:1.13.1:compile
[DEBUG]          org.sonatype.sisu:sisu-inject-plexus:jar:2.3.0:compile
[DEBUG]             org.sonatype.sisu:sisu-inject-bean:jar:2.3.0:compile
[DEBUG]                org.sonatype.sisu:sisu-guice:jar:no_aop:3.1.0:compile
[DEBUG]                   org.sonatype.sisu:sisu-guava:jar:0.9.9:compile
[DEBUG]          org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile
[DEBUG]          org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3:compile
[DEBUG]             org.sonatype.plexus:plexus-cipher:jar:1.4:compile
[DEBUG]       org.eclipse.aether:aether-util:jar:1.1.0:compile
[DEBUG]    org.apache.maven.reporting:maven-reporting-api:jar:3.0:compile
[DEBUG]       org.apache.maven.doxia:doxia-sink-api:jar:1.0:compile
[DEBUG]    org.apache.maven:maven-archiver:jar:3.5.2:compile
[DEBUG]       org.apache.maven:maven-artifact:jar:3.1.1:compile
[DEBUG]       org.apache.maven:maven-model:jar:3.1.1:compile
[DEBUG]       org.apache.maven.shared:maven-shared-utils:jar:3.3.3:compile
[DEBUG]       commons-io:commons-io:jar:2.6:compile
[DEBUG]       org.apache.commons:commons-compress:jar:1.20:compile
[DEBUG]       org.codehaus.plexus:plexus-interpolation:jar:1.26:compile
[DEBUG]    org.apache.commons:commons-exec:jar:1.3:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:3.4.1:compile
[DEBUG]    org.codehaus.plexus:plexus-archiver:jar:4.2.7:compile
[DEBUG]       org.codehaus.plexus:plexus-io:jar:3.2.0:compile
[DEBUG]       org.iq80.snappy:snappy:jar:0.4:compile
[DEBUG]       org.tukaani:xz:jar:1.9:runtime
[DEBUG]    org.codehaus.plexus:plexus-classworlds:jar:2.6.0:compile
[DEBUG]    org.scala-sbt:zinc_2.13:jar:1.6.1:compile
[DEBUG]       org.scala-lang:scala-library:jar:2.13.6:compile
[DEBUG]       org.scala-sbt:zinc-core_2.13:jar:1.6.1:compile
[DEBUG]          org.scala-sbt:zinc-apiinfo_2.13:jar:1.6.1:compile
[DEBUG]             org.scala-sbt:compiler-bridge_2.13:jar:1.6.1:compile
[DEBUG]          org.scala-sbt:zinc-classpath_2.13:jar:1.6.1:compile
[DEBUG]             org.scala-lang:scala-compiler:jar:2.13.6:compile
[DEBUG]          org.scala-sbt:compiler-interface:jar:1.6.1:compile
[DEBUG]             org.scala-sbt:util-interface:jar:1.6.1:compile
[DEBUG]          org.scala-sbt:zinc-persist-core-assembly:jar:1.6.1:compile
[DEBUG]          org.scala-lang.modules:scala-parallel-collections_2.13:jar:0.2.0:compile
[DEBUG]          org.scala-sbt:io_2.13:jar:1.6.0:compile
[DEBUG]             com.swoval:file-tree-views:jar:2.1.7:compile
[DEBUG]             net.java.dev.jna:jna:jar:5.8.0:compile
[DEBUG]             net.java.dev.jna:jna-platform:jar:5.8.0:compile
[DEBUG]          org.scala-sbt:util-logging_2.13:jar:1.6.1:compile
[DEBUG]             org.scala-sbt:collections_2.13:jar:1.6.1:compile
[DEBUG]                org.scala-sbt:util-position_2.13:jar:1.6.1:compile
[DEBUG]             org.scala-sbt:core-macros_2.13:jar:1.6.1:compile
[DEBUG]             org.jline:jline-terminal:jar:3.19.0:compile
[DEBUG]             org.scala-lang:scala-reflect:jar:2.13.6:compile
[DEBUG]          org.scala-sbt:util-relation_2.13:jar:1.6.1:compile
[DEBUG]       org.scala-sbt:zinc-persist_2.13:jar:1.6.1:compile
[DEBUG]       org.scala-sbt:zinc-compile-core_2.13:jar:1.6.1:compile
[DEBUG]          org.scala-lang.modules:scala-parser-combinators_2.13:jar:1.1.2:compile
[DEBUG]          net.openhft:zero-allocation-hashing:jar:0.10.1:compile
[DEBUG]          org.scala-sbt:util-control_2.13:jar:1.6.1:compile
[DEBUG]       org.scala-sbt:zinc-classfile_2.13:jar:1.6.1:compile
[DEBUG] Created new class realm plugin>net.alchim31.maven:scala-maven-plugin:4.6.1
[DEBUG] Importing foreign packages into class realm plugin>net.alchim31.maven:scala-maven-plugin:4.6.1
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>net.alchim31.maven:scala-maven-plugin:4.6.1
[DEBUG]   Included: net.alchim31.maven:scala-maven-plugin:jar:4.6.1
[DEBUG]   Included: org.apache.maven.shared:maven-dependency-tree:jar:3.1.0
[DEBUG]   Included: org.sonatype.aether:aether-util:jar:1.13.1
[DEBUG]   Included: org.sonatype.sisu:sisu-inject-bean:jar:2.3.0
[DEBUG]   Included: org.sonatype.sisu:sisu-guice:jar:no_aop:3.1.0
[DEBUG]   Included: org.sonatype.sisu:sisu-guava:jar:0.9.9
[DEBUG]   Included: org.codehaus.plexus:plexus-component-annotations:jar:1.5.5
[DEBUG]   Included: org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3
[DEBUG]   Included: org.sonatype.plexus:plexus-cipher:jar:1.4
[DEBUG]   Included: org.eclipse.aether:aether-util:jar:1.1.0
[DEBUG]   Included: org.apache.maven.reporting:maven-reporting-api:jar:3.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-sink-api:jar:1.0
[DEBUG]   Included: org.apache.maven:maven-archiver:jar:3.5.2
[DEBUG]   Included: org.apache.maven.shared:maven-shared-utils:jar:3.3.3
[DEBUG]   Included: commons-io:commons-io:jar:2.6
[DEBUG]   Included: org.apache.commons:commons-compress:jar:1.20
[DEBUG]   Included: org.codehaus.plexus:plexus-interpolation:jar:1.26
[DEBUG]   Included: org.apache.commons:commons-exec:jar:1.3
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:3.4.1
[DEBUG]   Included: org.codehaus.plexus:plexus-archiver:jar:4.2.7
[DEBUG]   Included: org.codehaus.plexus:plexus-io:jar:3.2.0
[DEBUG]   Included: org.iq80.snappy:snappy:jar:0.4
[DEBUG]   Included: org.tukaani:xz:jar:1.9
[DEBUG]   Included: org.scala-sbt:zinc_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-lang:scala-library:jar:2.13.6
[DEBUG]   Included: org.scala-sbt:zinc-core_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-apiinfo_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:compiler-bridge_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-classpath_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-lang:scala-compiler:jar:2.13.6
[DEBUG]   Included: org.scala-sbt:compiler-interface:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:util-interface:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-persist-core-assembly:jar:1.6.1
[DEBUG]   Included: org.scala-lang.modules:scala-parallel-collections_2.13:jar:0.2.0
[DEBUG]   Included: org.scala-sbt:io_2.13:jar:1.6.0
[DEBUG]   Included: com.swoval:file-tree-views:jar:2.1.7
[DEBUG]   Included: net.java.dev.jna:jna:jar:5.8.0
[DEBUG]   Included: net.java.dev.jna:jna-platform:jar:5.8.0
[DEBUG]   Included: org.scala-sbt:util-logging_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:collections_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:util-position_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:core-macros_2.13:jar:1.6.1
[DEBUG]   Included: org.jline:jline-terminal:jar:3.19.0
[DEBUG]   Included: org.scala-lang:scala-reflect:jar:2.13.6
[DEBUG]   Included: org.scala-sbt:util-relation_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-persist_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-compile-core_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-lang.modules:scala-parser-combinators_2.13:jar:1.1.2
[DEBUG]   Included: net.openhft:zero-allocation-hashing:jar:0.10.1
[DEBUG]   Included: org.scala-sbt:util-control_2.13:jar:1.6.1
[DEBUG]   Included: org.scala-sbt:zinc-classfile_2.13:jar:1.6.1
[DEBUG] Configuring mojo net.alchim31.maven:scala-maven-plugin:4.6.1:add-source from plugin realm ClassRealm[plugin>net.alchim31.maven:scala-maven-plugin:4.6.1, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
[DEBUG] Configuring mojo 'net.alchim31.maven:scala-maven-plugin:4.6.1:add-source' with basic configurator -->
[DEBUG]   (f) project = MavenProject: G:A:1.2.3-SNAPSHOT @ /tmp/1/x/pom.xml
[DEBUG]   (f) sourceDir = /tmp/1/x
[DEBUG]   (f) testSourceDir = /tmp/1/x/src/test/java/../scala
[DEBUG]   (f) useCanonicalPath = true
[DEBUG] -- end configuration --
[INFO] Add Source directory: /tmp/1/x
[INFO] Add Test Source directory: /tmp/1/x/src/test/scala
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ A ---
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for snapshots (http://snapshots.maven.codehaus.org/maven2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for central (http://repo1.maven.org/maven2).
[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=414301, ConflictMarker.markTime=150527, ConflictMarker.nodeCount=77, ConflictIdSorter.graphTime=208467, ConflictIdSorter.topsortTime=34693, ConflictIdSorter.conflictIdCount=26, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1089605, ConflictResolver.conflictItemCount=74, DefaultDependencyCollector.collectTime=76741613, DefaultDependencyCollector.transformTime=1937977}
[DEBUG] org.apache.maven.plugins:maven-resources-plugin:jar:2.6
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-project:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-profile:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-artifact-manager:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-plugin-registry:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-core:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6:compile
[DEBUG]       org.apache.maven.reporting:maven-reporting-api:jar:2.0.6:compile
[DEBUG]          org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7:compile
[DEBUG]       org.apache.maven:maven-repository-metadata:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-error-diagnostics:jar:2.0.6:compile
[DEBUG]       commons-cli:commons-cli:jar:1.0:compile
[DEBUG]       org.apache.maven:maven-plugin-descriptor:jar:2.0.6:compile
[DEBUG]       org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4:compile
[DEBUG]       classworlds:classworlds:jar:1.1:compile
[DEBUG]    org.apache.maven:maven-artifact:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-settings:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-model:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-monitor:jar:2.0.6:compile
[DEBUG]    org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9-stable-1:compile
[DEBUG]       junit:junit:jar:3.8.1:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:2.0.5:compile
[DEBUG]    org.apache.maven.shared:maven-filtering:jar:1.1:compile
[DEBUG]       org.sonatype.plexus:plexus-build-api:jar:0.0.4:compile
[DEBUG]    org.codehaus.plexus:plexus-interpolation:jar:1.13:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.6
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.6
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-resources-plugin:2.6
[DEBUG]   Included: org.apache.maven.plugins:maven-resources-plugin:jar:2.6
[DEBUG]   Included: org.apache.maven.reporting:maven-reporting-api:jar:2.0.6
[DEBUG]   Included: org.apache.maven.doxia:doxia-sink-api:jar:1.0-alpha-7
[DEBUG]   Included: commons-cli:commons-cli:jar:1.0
[DEBUG]   Included: org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4
[DEBUG]   Included: junit:junit:jar:3.8.1
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:2.0.5
[DEBUG]   Included: org.apache.maven.shared:maven-filtering:jar:1.1
[DEBUG]   Included: org.sonatype.plexus:plexus-build-api:jar:0.0.4
[DEBUG]   Included: org.codehaus.plexus:plexus-interpolation:jar:1.13
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-resources-plugin:2.6:resources from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-resources-plugin:2.6, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-resources-plugin:2.6:resources' with basic configurator -->
[DEBUG]   (f) buildFilters = []
[DEBUG]   (f) escapeWindowsPaths = true
[DEBUG]   (s) includeEmptyDirs = false
[DEBUG]   (s) outputDirectory = /tmp/1/x/target/classes
[DEBUG]   (s) overwrite = false
[DEBUG]   (f) project = MavenProject: G:A:1.2.3-SNAPSHOT @ /tmp/1/x/pom.xml
[DEBUG]   (s) resources = [Resource {targetPath: null, filtering: false, FileSet {directory: /tmp/1/x/src/main/resources, PatternSet [includes: {}, excludes: {}]}}]
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@6ede46f6
[DEBUG]   (f) supportMultiLineFiltering = false
[DEBUG]   (f) useBuildFilters = true
[DEBUG]   (s) useDefaultDelimiters = true
[DEBUG] -- end configuration --
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[DEBUG] resource with targetPath null
directory /tmp/1/x/src/main/resources
excludes []
includes []
[INFO] skip non existing resourceDirectory /tmp/1/x/src/main/resources
[DEBUG] no use filter components
[INFO] 
[INFO] --- scala-maven-plugin:4.6.1:compile (compile-it) @ A ---
[DEBUG] Configuring mojo net.alchim31.maven:scala-maven-plugin:4.6.1:compile from plugin realm ClassRealm[plugin>net.alchim31.maven:scala-maven-plugin:4.6.1, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
[DEBUG] Configuring mojo 'net.alchim31.maven:scala-maven-plugin:4.6.1:compile' with basic configurator -->
[DEBUG]   (f) additionalDependencies = []
[DEBUG]   (f) analysisCacheFile = /tmp/1/x/target/analysis/compile
[DEBUG]   (f) checkMultipleScalaVersions = true
[DEBUG]   (f) classpath = scala_maven.Classpath@6981f8f3
[DEBUG]   (f) compileOrder = Mixed
[DEBUG]   (f) displayCmd = false
[DEBUG]   (f) encoding = UTF-8
[DEBUG]   (f) failOnMultipleScalaVersions = false
[DEBUG]   (f) forceUseArgFile = false
[DEBUG]   (f) fork = true
[DEBUG]   (f) javacArgs = []
[DEBUG]   (f) javacGenerateDebugSymbols = true
[DEBUG]   (f) notifyCompilation = true
[DEBUG]   (f) outputDir = /tmp/1/x/target/classes
[DEBUG]   (f) pluginArtifacts = [net.alchim31.maven:scala-maven-plugin:maven-plugin:4.6.1:, org.apache.maven.shared:maven-dependency-tree:jar:3.1.0:compile, org.apache.maven:maven-core:jar:3.0.5:compile, org.apache.maven:maven-settings:jar:3.0.5:compile, org.apache.maven:maven-settings-builder:jar:3.0.5:compile, org.apache.maven:maven-repository-metadata:jar:3.0.5:compile, org.apache.maven:maven-plugin-api:jar:3.0.5:compile, org.apache.maven:maven-model-builder:jar:3.0.5:compile, org.apache.maven:maven-aether-provider:jar:3.0.5:compile, org.sonatype.aether:aether-spi:jar:1.13.1:compile, org.sonatype.aether:aether-impl:jar:1.13.1:compile, org.sonatype.aether:aether-api:jar:1.13.1:compile, org.sonatype.aether:aether-util:jar:1.13.1:compile, org.sonatype.sisu:sisu-inject-plexus:jar:2.3.0:compile, org.sonatype.sisu:sisu-inject-bean:jar:2.3.0:compile, org.sonatype.sisu:sisu-guice:jar:no_aop:3.1.0:compile, org.sonatype.sisu:sisu-guava:jar:0.9.9:compile, org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile, org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3:compile, org.sonatype.plexus:plexus-cipher:jar:1.4:compile, org.eclipse.aether:aether-util:jar:1.1.0:compile, org.apache.maven.reporting:maven-reporting-api:jar:3.0:compile, org.apache.maven.doxia:doxia-sink-api:jar:1.0:compile, org.apache.maven:maven-archiver:jar:3.5.2:compile, org.apache.maven:maven-artifact:jar:3.1.1:compile, org.apache.maven:maven-model:jar:3.1.1:compile, org.apache.maven.shared:maven-shared-utils:jar:3.3.3:compile, commons-io:commons-io:jar:2.6:compile, org.apache.commons:commons-compress:jar:1.20:compile, org.codehaus.plexus:plexus-interpolation:jar:1.26:compile, org.apache.commons:commons-exec:jar:1.3:compile, org.codehaus.plexus:plexus-utils:jar:3.4.1:compile, org.codehaus.plexus:plexus-archiver:jar:4.2.7:compile, org.codehaus.plexus:plexus-io:jar:3.2.0:compile, org.iq80.snappy:snappy:jar:0.4:compile, org.tukaani:xz:jar:1.9:runtime, org.codehaus.plexus:plexus-classworlds:jar:2.6.0:compile, org.scala-sbt:zinc_2.13:jar:1.6.1:compile, org.scala-lang:scala-library:jar:2.13.6:compile, org.scala-sbt:zinc-core_2.13:jar:1.6.1:compile, org.scala-sbt:zinc-apiinfo_2.13:jar:1.6.1:compile, org.scala-sbt:compiler-bridge_2.13:jar:1.6.1:compile, org.scala-sbt:zinc-classpath_2.13:jar:1.6.1:compile, org.scala-lang:scala-compiler:jar:2.13.6:compile, org.scala-sbt:compiler-interface:jar:1.6.1:compile, org.scala-sbt:util-interface:jar:1.6.1:compile, org.scala-sbt:zinc-persist-core-assembly:jar:1.6.1:compile, org.scala-lang.modules:scala-parallel-collections_2.13:jar:0.2.0:compile, org.scala-sbt:io_2.13:jar:1.6.0:compile, com.swoval:file-tree-views:jar:2.1.7:compile, net.java.dev.jna:jna:jar:5.8.0:compile, net.java.dev.jna:jna-platform:jar:5.8.0:compile, org.scala-sbt:util-logging_2.13:jar:1.6.1:compile, org.scala-sbt:collections_2.13:jar:1.6.1:compile, org.scala-sbt:util-position_2.13:jar:1.6.1:compile, org.scala-sbt:core-macros_2.13:jar:1.6.1:compile, org.jline:jline-terminal:jar:3.19.0:compile, org.scala-lang:scala-reflect:jar:2.13.6:compile, org.scala-sbt:util-relation_2.13:jar:1.6.1:compile, org.scala-sbt:zinc-persist_2.13:jar:1.6.1:compile, org.scala-sbt:zinc-compile-core_2.13:jar:1.6.1:compile, org.scala-lang.modules:scala-parser-combinators_2.13:jar:1.1.2:compile, net.openhft:zero-allocation-hashing:jar:0.10.1:compile, org.scala-sbt:util-control_2.13:jar:1.6.1:compile, org.scala-sbt:zinc-classfile_2.13:jar:1.6.1:compile]
[DEBUG]   (f) project = MavenProject: G:A:1.2.3-SNAPSHOT @ /tmp/1/x/pom.xml
[DEBUG]   (f) recompileMode = incremental
[DEBUG]   (f) scalaOrganization = org.scala-lang
[DEBUG]   (f) scalaVersion = 2.13.8
[DEBUG]   (f) sendJavaToScalac = true
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@6ede46f6
[DEBUG]   (f) source = 11
[DEBUG]   (f) sourceDir = /tmp/1/x
[DEBUG]   (f) target = 11
[DEBUG]   (f) useCanonicalPath = true
[DEBUG] -- end configuration --
[DEBUG] Checking for multiple versions of scala
[DEBUG] building maven31 dependency graph for G:A:jar:1.2.3-SNAPSHOT with Maven31DependencyGraphBuilder
[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=57612, ConflictMarker.markTime=24441, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=16039, ConflictIdSorter.topsortTime=8017, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=17998, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=5443, DefaultDependencyCollector.transformTime=141036}
[DEBUG] G:A:jar:1.2.3-SNAPSHOT
[DEBUG] /tmp/1/x
[DEBUG] includes = [**/*.java,**/*.scala,]
[DEBUG] excludes = []
[DEBUG] compilerJars: /home/user/.m2/repository/org/scala-lang/scala-compiler/2.13.8/scala-compiler-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-library/2.13.8/scala-library-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-reflect/2.13.8/scala-reflect-2.13.8.jar:/home/user/.m2/repository/org/jline/jline/3.21.0/jline-3.21.0.jar:/home/user/.m2/repository/net/java/dev/jna/jna/5.9.0/jna-5.9.0.jar
[DEBUG] libraryJars: /home/user/.m2/repository/org/scala-lang/scala-library/2.13.8/scala-library-2.13.8.jar
[INFO] Using incremental compilation using Mixed compile order
[INFO] Compiler bridge file: /home/user/.sbt/1.0/zinc/org.scala-sbt/org.scala-sbt-compiler-bridge_2.13-1.6.1-bin_2.13.8__55.0-1.6.1_20220117T214008.jar
[DEBUG] [zinc] IncrementalCompile -----------
[DEBUG] IncrementalCompile.incrementalCompile
[DEBUG] previous = Stamps for: 2 products, 1 sources, 1 libraries
[DEBUG] current source = Set(/tmp/1/x/X.scala)
[DEBUG] Invalidating '/modules/java.base/java/lang/Object.class' because could not find class java.lang.Object on the classpath.
[DEBUG] > initialChanges = InitialChanges(Changes(added = Set(), removed = Set(), changed = Set(), unmodified = ...),Set(),Set(/modules/java.base/java/lang/Object.class),API Changes: Set())
[DEBUG] 
Initial source changes:
	removed: Set()
	added: Set()
	modified: Set()
Invalidated products: Set()
External API changes: API Changes: Set()
Modified binary dependencies: Set(/modules/java.base/java/lang/Object.class)
Initial directly invalidated classes: Set()
Sources indirectly invalidated by:
	product: Set()
	binary dep: Set(/tmp/1/x/X.scala)
	external source: Set()
[DEBUG] all 1 sources are invalidated
[DEBUG] Initial set of included nodes: 
[DEBUG] Recompiling all sources: number of invalidated sources > 50.0% of all sources
[DEBUG] compilation cycle 1
[INFO] compiling 1 Scala source to /tmp/1/x/target/classes ...
[DEBUG] Returning already retrieved and compiled bridge: /home/user/.sbt/1.0/zinc/org.scala-sbt/org.scala-sbt-compiler-bridge_2.13-1.6.1-bin_2.13.8__55.0-1.6.1_20220117T214008.jar.
[DEBUG] [zinc] Running cached compiler 5c0e2ec for Scala compiler version 2.13.8
[DEBUG] [zinc] The Scala compiler is invoked with:
	-target:11
	-bootclasspath
	
	-classpath
	/tmp/1/x/target/classes:/home/user/.m2/repository/org/scala-lang/scala-compiler/2.13.8/scala-compiler-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-library/2.13.8/scala-library-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-reflect/2.13.8/scala-reflect-2.13.8.jar:/home/user/.m2/repository/org/jline/jline/3.21.0/jline-3.21.0.jar:/home/user/.m2/repository/net/java/dev/jna/jna/5.9.0/jna-5.9.0.jar
[DEBUG] Scala compilation took 1.834386269 s
[INFO] done compiling
[INFO] compile in 2.6 s
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ A ---
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for apache-snapshots (http://people.apache.org/repo/m2-snapshot-repository).
[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=499995, ConflictMarker.markTime=113040, ConflictMarker.nodeCount=160, ConflictIdSorter.graphTime=123469, ConflictIdSorter.topsortTime=39339, ConflictIdSorter.conflictIdCount=43, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=841605, ConflictResolver.conflictItemCount=63, DefaultDependencyCollector.collectTime=78985831, DefaultDependencyCollector.transformTime=1646633}
[DEBUG] org.apache.maven.plugins:maven-compiler-plugin:jar:3.1
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-artifact:jar:2.0.9:compile
[DEBUG]       org.codehaus.plexus:plexus-utils:jar:1.5.1:compile
[DEBUG]    org.apache.maven:maven-core:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-settings:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-profile:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-model:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-repository-metadata:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-error-diagnostics:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-project:jar:2.0.9:compile
[DEBUG]          org.apache.maven:maven-plugin-registry:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-plugin-descriptor:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-artifact-manager:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-monitor:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-toolchain:jar:1.0:compile
[DEBUG]    org.apache.maven.shared:maven-shared-utils:jar:0.1:compile
[DEBUG]       com.google.code.findbugs:jsr305:jar:2.0.1:compile
[DEBUG]    org.apache.maven.shared:maven-shared-incremental:jar:1.1:compile
[DEBUG]       org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile (version managed from default)
[DEBUG]    org.codehaus.plexus:plexus-compiler-api:jar:2.2:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-manager:jar:2.2:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-javac:jar:2.2:runtime
[DEBUG]    org.codehaus.plexus:plexus-container-default:jar:1.5.5:compile
[DEBUG]       org.codehaus.plexus:plexus-classworlds:jar:2.2.2:compile
[DEBUG]       org.apache.xbean:xbean-reflect:jar:3.4:compile
[DEBUG]          log4j:log4j:jar:1.2.12:compile
[DEBUG]          commons-logging:commons-logging-api:jar:1.1:compile
[DEBUG]       com.google.collections:google-collections:jar:1.0:compile
[DEBUG]       junit:junit:jar:3.8.2:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1
[DEBUG]   Included: org.apache.maven.plugins:maven-compiler-plugin:jar:3.1
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:1.5.1
[DEBUG]   Included: org.apache.maven.shared:maven-shared-utils:jar:0.1
[DEBUG]   Included: com.google.code.findbugs:jsr305:jar:2.0.1
[DEBUG]   Included: org.apache.maven.shared:maven-shared-incremental:jar:1.1
[DEBUG]   Included: org.codehaus.plexus:plexus-component-annotations:jar:1.5.5
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-api:jar:2.2
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-manager:jar:2.2
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-javac:jar:2.2
[DEBUG]   Included: org.apache.xbean:xbean-reflect:jar:3.4
[DEBUG]   Included: log4j:log4j:jar:1.2.12
[DEBUG]   Included: commons-logging:commons-logging-api:jar:1.1
[DEBUG]   Included: com.google.collections:google-collections:jar:1.0
[DEBUG]   Included: junit:junit:jar:3.8.2
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-compiler-plugin:3.1:compile from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-compiler-plugin:3.1, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-compiler-plugin:3.1:compile' with basic configurator -->
[DEBUG]   (f) basedir = /tmp/1/x
[DEBUG]   (f) buildDirectory = /tmp/1/x/target
[DEBUG]   (f) classpathElements = [/tmp/1/x/target/classes]
[DEBUG]   (f) compileSourceRoots = [/tmp/1/x/src/main/java, /tmp/1/x]
[DEBUG]   (f) compilerId = javac
[DEBUG]   (f) debug = true
[DEBUG]   (f) failOnError = true
[DEBUG]   (f) forceJavacCompilerUse = false
[DEBUG]   (f) fork = false
[DEBUG]   (f) generatedSourcesDirectory = /tmp/1/x/target/generated-sources/annotations
[DEBUG]   (f) mojoExecution = org.apache.maven.plugins:maven-compiler-plugin:3.1:compile {execution: default-compile}
[DEBUG]   (f) optimize = false
[DEBUG]   (f) outputDirectory = /tmp/1/x/target/classes
[DEBUG]   (f) projectArtifact = G:A:jar:1.2.3-SNAPSHOT
[DEBUG]   (f) showDeprecation = false
[DEBUG]   (f) showWarnings = false
[DEBUG]   (f) skipMultiThreadWarning = false
[DEBUG]   (f) source = 11
[DEBUG]   (f) staleMillis = 0
[DEBUG]   (f) target = 11
[DEBUG]   (f) useIncrementalCompilation = true
[DEBUG]   (f) verbose = false
[DEBUG]   (f) mavenSession = org.apache.maven.execution.MavenSession@6ede46f6
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@6ede46f6
[DEBUG] -- end configuration --
[DEBUG] Using compiler 'javac'.
[DEBUG] Source directories: [/tmp/1/x]
[DEBUG] Classpath: [/tmp/1/x/target/classes]
[DEBUG] Output directory: /tmp/1/x/target/classes
[DEBUG] CompilerReuseStrategy: reuseCreated
[DEBUG] useIncrementalCompilation enabled

[akshaal]

Also a diff between two invocations of mvn -X compile: one when the plugin decides to recompile everything and one where it decides that there is nothing to recompile.

--- nok	2022-05-10 23:11:21.058018406 +0200
+++ ok	2022-05-10 23:12:10.817908605 +0200
@@ -218,7 +218,7 @@
   <session default-value="${session}"/>
 </configuration>
 [DEBUG] =======================================================================
-[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=50882, ConflictMarker.markTime=237926, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=27156, ConflictIdSorter.topsortTime=491179, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1297117, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=222495, DefaultDependencyCollector.transformTime=3665894}
+[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=39355, ConflictMarker.markTime=170048, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=19208, ConflictIdSorter.topsortTime=351513, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=861743, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=126626, DefaultDependencyCollector.transformTime=2545553}
 [DEBUG] G:A:jar:1.2.3-SNAPSHOT
 [INFO] 
 [INFO] --- scala-maven-plugin:4.6.1:add-source (add-source) @ A ---
@@ -227,7 +227,7 @@
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for repository.jboss.org (http://repository.jboss.org/maven2).
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for snapshots.jboss.org (http://snapshots.jboss.org/maven2).
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for oss.sonatype.org/jboss-snapshots (http://oss.sonatype.org/content/repositories/jboss-snapshots).
-[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=1158238, ConflictMarker.markTime=401752, ConflictMarker.nodeCount=224, ConflictIdSorter.graphTime=344556, ConflictIdSorter.topsortTime=68622, ConflictIdSorter.conflictIdCount=76, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=6021203, ConflictResolver.conflictItemCount=156, DefaultDependencyCollector.collectTime=279112888, DefaultDependencyCollector.transformTime=8079883}
+[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=1111817, ConflictMarker.markTime=294304, ConflictMarker.nodeCount=224, ConflictIdSorter.graphTime=324008, ConflictIdSorter.topsortTime=69775, ConflictIdSorter.conflictIdCount=76, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=5976739, ConflictResolver.conflictItemCount=156, DefaultDependencyCollector.collectTime=271602963, DefaultDependencyCollector.transformTime=7878041}
 [DEBUG] net.alchim31.maven:scala-maven-plugin:jar:4.6.1
 [DEBUG]    org.apache.maven.shared:maven-dependency-tree:jar:3.1.0:compile
 [DEBUG]       org.apache.maven:maven-core:jar:3.0.5:compile
@@ -361,7 +361,7 @@
 [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ A ---
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for snapshots (http://snapshots.maven.codehaus.org/maven2).
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for central (http://repo1.maven.org/maven2).
-[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=414301, ConflictMarker.markTime=150527, ConflictMarker.nodeCount=77, ConflictIdSorter.graphTime=208467, ConflictIdSorter.topsortTime=34693, ConflictIdSorter.conflictIdCount=26, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1089605, ConflictResolver.conflictItemCount=74, DefaultDependencyCollector.collectTime=76741613, DefaultDependencyCollector.transformTime=1937977}
+[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=252925, ConflictMarker.markTime=103188, ConflictMarker.nodeCount=77, ConflictIdSorter.graphTime=115615, ConflictIdSorter.topsortTime=41435, ConflictIdSorter.conflictIdCount=26, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=683761, ConflictResolver.conflictItemCount=74, DefaultDependencyCollector.collectTime=55408679, DefaultDependencyCollector.transformTime=1228206}
 [DEBUG] org.apache.maven.plugins:maven-resources-plugin:jar:2.6
 [DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.6:compile
 [DEBUG]    org.apache.maven:maven-project:jar:2.0.6:compile
@@ -457,7 +457,7 @@
 [DEBUG] -- end configuration --
 [DEBUG] Checking for multiple versions of scala
 [DEBUG] building maven31 dependency graph for G:A:jar:1.2.3-SNAPSHOT with Maven31DependencyGraphBuilder
-[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=57612, ConflictMarker.markTime=24441, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=16039, ConflictIdSorter.topsortTime=8017, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=17998, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=5443, DefaultDependencyCollector.transformTime=141036}
+[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=30205, ConflictMarker.markTime=19124, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=2754, ConflictIdSorter.topsortTime=4687, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=12748, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=3872, DefaultDependencyCollector.transformTime=82106}
 [DEBUG] G:A:jar:1.2.3-SNAPSHOT
 [DEBUG] /tmp/1/x
 [DEBUG] includes = [**/*.java,**/*.scala,]
@@ -470,41 +470,13 @@
 [DEBUG] IncrementalCompile.incrementalCompile
 [DEBUG] previous = Stamps for: 2 products, 1 sources, 1 libraries
 [DEBUG] current source = Set(/tmp/1/x/X.scala)
-[DEBUG] Invalidating '/modules/java.base/java/lang/Object.class' because could not find class java.lang.Object on the classpath.
-[DEBUG] > initialChanges = InitialChanges(Changes(added = Set(), removed = Set(), changed = Set(), unmodified = ...),Set(),Set(/modules/java.base/java/lang/Object.class),API Changes: Set())
-[DEBUG] 
-Initial source changes:
-	removed: Set()
-	added: Set()
-	modified: Set()
-Invalidated products: Set()
-External API changes: API Changes: Set()
-Modified binary dependencies: Set(/modules/java.base/java/lang/Object.class)
-Initial directly invalidated classes: Set()
-Sources indirectly invalidated by:
-	product: Set()
-	binary dep: Set(/tmp/1/x/X.scala)
-	external source: Set()
-[DEBUG] all 1 sources are invalidated
-[DEBUG] Initial set of included nodes: 
-[DEBUG] Recompiling all sources: number of invalidated sources > 50.0% of all sources
-[DEBUG] compilation cycle 1
-[INFO] compiling 1 Scala source to /tmp/1/x/target/classes ...
-[DEBUG] Returning already retrieved and compiled bridge: /home/user/.sbt/1.0/zinc/org.scala-sbt/org.scala-sbt-compiler-bridge_2.13-1.6.1-bin_2.13.8__55.0-1.6.1_20220117T214008.jar.
-[DEBUG] [zinc] Running cached compiler 5c0e2ec for Scala compiler version 2.13.8
-[DEBUG] [zinc] The Scala compiler is invoked with:
-	-target:11
-	-bootclasspath
-	
-	-classpath
-	/tmp/1/x/target/classes:/home/user/.m2/repository/org/scala-lang/scala-compiler/2.13.8/scala-compiler-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-library/2.13.8/scala-library-2.13.8.jar:/home/user/.m2/repository/org/scala-lang/scala-reflect/2.13.8/scala-reflect-2.13.8.jar:/home/user/.m2/repository/org/jline/jline/3.21.0/jline-3.21.0.jar:/home/user/.m2/repository/net/java/dev/jna/jna/5.9.0/jna-5.9.0.jar
-[DEBUG] Scala compilation took 1.834386269 s
-[INFO] done compiling
-[INFO] compile in 2.6 s
+[DEBUG] > initialChanges = InitialChanges(Changes(added = Set(), removed = Set(), changed = Set(), unmodified = ...),Set(),Set(),API Changes: Set())
+[DEBUG] No changes
+[INFO] compile in 0.7 s
 [INFO] 
 [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ A ---
 [DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for apache-snapshots (http://people.apache.org/repo/m2-snapshot-repository).
-[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=499995, ConflictMarker.markTime=113040, ConflictMarker.nodeCount=160, ConflictIdSorter.graphTime=123469, ConflictIdSorter.topsortTime=39339, ConflictIdSorter.conflictIdCount=43, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=841605, ConflictResolver.conflictItemCount=63, DefaultDependencyCollector.collectTime=78985831, DefaultDependencyCollector.transformTime=1646633}
+[DEBUG] Dependency collection stats {ConflictMarker.analyzeTime=269487, ConflictMarker.markTime=111715, ConflictMarker.nodeCount=160, ConflictIdSorter.graphTime=161126, ConflictIdSorter.topsortTime=35722, ConflictIdSorter.conflictIdCount=43, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=821047, ConflictResolver.conflictItemCount=63, DefaultDependencyCollector.collectTime=87372899, DefaultDependencyCollector.transformTime=1424546}
 [DEBUG] org.apache.maven.plugins:maven-compiler-plugin:jar:3.1
 [DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.9:compile
 [DEBUG]    org.apache.maven:maven-artifact:jar:2.0.9:compile
@@ -587,4 +559,3 @@
 [DEBUG] Output directory: /tmp/1/x/target/classes
 [DEBUG] CompilerReuseStrategy: reuseCreated
 [DEBUG] useIncrementalCompilation enabled
-[INFO] Nothing to compile - all classes are up to date

[slandelle]

@eed3si9n Could you please share some insights? I can reproduce with zinc 1.6.1 and 1.7.0-M2.

Is in a bug in zinc, or in the way we use zinc?

[eed3si9n]

@slandelle Sorry I don't really have a clear understanding of how that works. What I know is that to accommodate JDK 9 we wrote a program that moves rt.jar to a directory named after JDK vendor and version name, and then pass the rt.jar along to the compiler with -Dscala.ext.dirs flag. I thought that was to work around the limitation of Scala compiler at the time. I don't know if this hack is still needed or if other build tools using Zinc are replicating it to support JDK 9 and up.

I also have a vague recollection of faking any rt.jar as a DummyVirtualFile when I implemented file virtualization in Zinc 1.4. Otherwise, one machine's analysis state can't be transferred to another since we all have different rt.jar:
https://github.com/sbt/zinc/blob/d56686b5d69f9e05d5121509677ebeadb7584007/internal/zinc-core/src/main/scala/sbt/internal/inc/MappedVirtualFile.scala#L65-L67
so [DEBUG] Invalidating '/modules/java.base/java/lang/Object.class' because could not find class java.lang.Object on the classpath. is suspicious.

[slandelle]

@eed3si9n Thanks a lot for chiming in!

I'm trying to debug, but what's incredible is that the issue disappears when running mvnDebug instead of mvn?!

[slandelle]

The weird invalidation only happens during the first run following a full compile.

• mvn clean compile
• mvn compile -X // weird unexpected invalidation
• mvn compile -X // no invalidation

Meaning the issue is probably with the analysis store when it's created for the first time.

[slandelle]

@eed3si9n I suspect this issue is similar to #502 which is a ClassLoader behavior change, most likely introduced in Jigsaw.

[slandelle]

Please upgrade to 4.6.2

[akshaal]

Thank you! It works fine now.

[akshaal]

Maybe this change needs a manual flag or be applied conditionally when java 9 or higher is detected?
Unfortunately, 4.6.2 breaks incremental compilation in java 8. "clean compile" goes fine in 4.6.2, but a consequent invocation of "compile" fails in 4.6.2. Works ok in 4.6.1. I can't reproduce the new issue in an isolated toy project, but as soon as I can reproduced it in a smaller project, I will create a dedicated issue, meanwhile just a stacktrace:

[ERROR] ## Exception when compiling 33 sources to /home/user/workspace/project/stuff/target/classes
java.lang.RuntimeException: rt.jar (class sbt.internal.inc.DummyVirtualFile) is not supported
scala.sys.package$.error(package.scala:27)
sbt.internal.inc.Locate$.definesClass(Locate.scala:92)
sbt.internal.inc.Locate.definesClass(Locate.scala)
sbt_inc.SbtIncrementalCompiler$1.definesClass(SbtIncrementalCompiler.java:119)
sbt.internal.inc.Locate$.$anonfun$entry$1(Locate.scala:60)
scala.collection.Iterator$$anon$9.next(Iterator.scala:575)
scala.collection.IterableOnceOps.collectFirst(IterableOnce.scala:1079)
scala.collection.IterableOnceOps.collectFirst$(IterableOnce.scala:1071)
scala.collection.AbstractIterator.collectFirst(Iterator.scala:1288)
sbt.internal.inc.Locate$.$anonfun$entry$2(Locate.scala:67)
sbt.internal.inc.LookupImpl.lookupOnClasspath(LookupImpl.scala:51)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$3(IncrementalCommon.scala:764)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$3$adapted(IncrementalCommon.scala:754)
scala.collection.IterableOnceOps.exists(IterableOnce.scala:591)
scala.collection.IterableOnceOps.exists$(IterableOnce.scala:588)
scala.collection.AbstractIterable.exists(Iterable.scala:919)
sbt.internal.inc.IncrementalCommon$.isLibraryChanged$1(IncrementalCommon.scala:754)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$1(IncrementalCommon.scala:774)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$1$adapted(IncrementalCommon.scala:732)
scala.collection.parallel.AugmentedIterableIterator.filter2combiner(RemainsIterator.scala:136)
scala.collection.parallel.AugmentedIterableIterator.filter2combiner$(RemainsIterator.scala:133)
scala.collection.parallel.immutable.ParVector$ParVectorIterator.filter2combiner(ParVector.scala:72)
scala.collection.parallel.ParIterableLike$Filter.leaf(ParIterableLike.scala:1083)
scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:52)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:97)
scala.collection.parallel.Task.tryLeaf(Tasks.scala:55)
scala.collection.parallel.Task.tryLeaf$(Tasks.scala:49)
scala.collection.parallel.ParIterableLike$Filter.tryLeaf(ParIterableLike.scala:1079)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal(Tasks.scala:159)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal$(Tasks.scala:156)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.internal(Tasks.scala:303)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:149)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:148)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:303)
java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
java.util.concurrent.ForkJoinTask.doJoin(ForkJoinTask.java:389)
java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:719)
scala.collection.parallel.ForkJoinTasks$WrappedTask.sync(Tasks.scala:242)
scala.collection.parallel.ForkJoinTasks$WrappedTask.sync$(Tasks.scala:242)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.sync(Tasks.scala:303)
scala.collection.parallel.ForkJoinTasks.executeAndWaitResult(Tasks.scala:286)
scala.collection.parallel.ForkJoinTasks.executeAndWaitResult$(Tasks.scala:279)
scala.collection.parallel.ForkJoinTaskSupport.executeAndWaitResult(TaskSupport.scala:59)
scala.collection.parallel.ExecutionContextTasks.executeAndWaitResult(Tasks.scala:409)
scala.collection.parallel.ExecutionContextTasks.executeAndWaitResult$(Tasks.scala:409)
scala.collection.parallel.ExecutionContextTaskSupport.executeAndWaitResult(TaskSupport.scala:75)
scala.collection.parallel.ParIterableLike$ResultMapping.leaf(ParIterableLike.scala:932)
scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:52)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:97)
scala.collection.parallel.Task.tryLeaf(Tasks.scala:55)
scala.collection.parallel.Task.tryLeaf$(Tasks.scala:49)
scala.collection.parallel.ParIterableLike$ResultMapping.tryLeaf(ParIterableLike.scala:927)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:152)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:148)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:303)
java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

[slandelle]

Sad. Most likely related to what happens in Zinc here: https://github.com/sbt/zinc/pull/982/files

Please chime in if you can create a reproducer.

[LuciferYang]

reproducer

Maybe this change needs a manual flag or be applied conditionally when java 9 or higher is detected? Unfortunately, 4.6.2 breaks incremental compilation in java 8. "clean compile" goes fine in 4.6.2, but a consequent invocation of "compile" fails in 4.6.2. Works ok in 4.6.1. I can't reproduce the new issue in an isolated toy project, but as soon as I can reproduced it in a smaller project, I will create a dedicated issue, meanwhile just a stacktrace:

[ERROR] ## Exception when compiling 33 sources to /home/user/workspace/project/stuff/target/classes
java.lang.RuntimeException: rt.jar (class sbt.internal.inc.DummyVirtualFile) is not supported
scala.sys.package$.error(package.scala:27)
sbt.internal.inc.Locate$.definesClass(Locate.scala:92)
sbt.internal.inc.Locate.definesClass(Locate.scala)
sbt_inc.SbtIncrementalCompiler$1.definesClass(SbtIncrementalCompiler.java:119)
sbt.internal.inc.Locate$.$anonfun$entry$1(Locate.scala:60)
scala.collection.Iterator$$anon$9.next(Iterator.scala:575)
scala.collection.IterableOnceOps.collectFirst(IterableOnce.scala:1079)
scala.collection.IterableOnceOps.collectFirst$(IterableOnce.scala:1071)
scala.collection.AbstractIterator.collectFirst(Iterator.scala:1288)
sbt.internal.inc.Locate$.$anonfun$entry$2(Locate.scala:67)
sbt.internal.inc.LookupImpl.lookupOnClasspath(LookupImpl.scala:51)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$3(IncrementalCommon.scala:764)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$3$adapted(IncrementalCommon.scala:754)
scala.collection.IterableOnceOps.exists(IterableOnce.scala:591)
scala.collection.IterableOnceOps.exists$(IterableOnce.scala:588)
scala.collection.AbstractIterable.exists(Iterable.scala:919)
sbt.internal.inc.IncrementalCommon$.isLibraryChanged$1(IncrementalCommon.scala:754)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$1(IncrementalCommon.scala:774)
sbt.internal.inc.IncrementalCommon$.$anonfun$isLibraryModified$1$adapted(IncrementalCommon.scala:732)
scala.collection.parallel.AugmentedIterableIterator.filter2combiner(RemainsIterator.scala:136)
scala.collection.parallel.AugmentedIterableIterator.filter2combiner$(RemainsIterator.scala:133)
scala.collection.parallel.immutable.ParVector$ParVectorIterator.filter2combiner(ParVector.scala:72)
scala.collection.parallel.ParIterableLike$Filter.leaf(ParIterableLike.scala:1083)
scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:52)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:97)
scala.collection.parallel.Task.tryLeaf(Tasks.scala:55)
scala.collection.parallel.Task.tryLeaf$(Tasks.scala:49)
scala.collection.parallel.ParIterableLike$Filter.tryLeaf(ParIterableLike.scala:1079)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal(Tasks.scala:159)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.internal$(Tasks.scala:156)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.internal(Tasks.scala:303)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:149)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:148)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:303)
java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
java.util.concurrent.ForkJoinTask.doJoin(ForkJoinTask.java:389)
java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:719)
scala.collection.parallel.ForkJoinTasks$WrappedTask.sync(Tasks.scala:242)
scala.collection.parallel.ForkJoinTasks$WrappedTask.sync$(Tasks.scala:242)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.sync(Tasks.scala:303)
scala.collection.parallel.ForkJoinTasks.executeAndWaitResult(Tasks.scala:286)
scala.collection.parallel.ForkJoinTasks.executeAndWaitResult$(Tasks.scala:279)
scala.collection.parallel.ForkJoinTaskSupport.executeAndWaitResult(TaskSupport.scala:59)
scala.collection.parallel.ExecutionContextTasks.executeAndWaitResult(Tasks.scala:409)
scala.collection.parallel.ExecutionContextTasks.executeAndWaitResult$(Tasks.scala:409)
scala.collection.parallel.ExecutionContextTaskSupport.executeAndWaitResult(TaskSupport.scala:75)
scala.collection.parallel.ParIterableLike$ResultMapping.leaf(ParIterableLike.scala:932)
scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:52)
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:97)
scala.collection.parallel.Task.tryLeaf(Tasks.scala:55)
scala.collection.parallel.Task.tryLeaf$(Tasks.scala:49)
scala.collection.parallel.ParIterableLike$ResultMapping.tryLeaf(ParIterableLike.scala:927)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:152)
scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:148)
scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:303)
java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

Looks the same as #615