java.nio.charset.UnmappableCharacterException: Input length = 1

[tamasmartin]

I am getting this exception when I run coverageReport task.

The stacktrace is:
java.nio.charset.UnmappableCharacterException: Input length = 1 at java.nio.charset.CoderResult.throwException(CoderResult.java:282) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178) at java.io.InputStreamReader.read(InputStreamReader.java:184) at java.io.BufferedReader.fill(BufferedReader.java:161) at java.io.BufferedReader.read(BufferedReader.java:182) at scala.io.BufferedSource$$anonfun$iter$1$$anonfun$apply$mcI$sp$1.apply$mcI$sp(BufferedSource.scala:38) at scala.io.Codec.wrap(Codec.scala:68) at scala.io.BufferedSource$$anonfun$iter$1.apply(BufferedSource.scala:38) at scala.io.BufferedSource$$anonfun$iter$1.apply(BufferedSource.scala:38) at scala.collection.Iterator$$anon$9.next(Iterator.scala:162) at scala.collection.Iterator$$anon$17.hasNext(Iterator.scala:511) at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) at scala.io.Source.hasNext(Source.scala:226) at scala.collection.Iterator$class.foreach(Iterator.scala:727) at scala.io.Source.foreach(Source.scala:178) at scala.collection.TraversableOnce$class.addString(TraversableOnce.scala:320) at scala.io.Source.addString(Source.scala:178) at scala.collection.TraversableOnce$class.mkString(TraversableOnce.scala:286) at scala.io.Source.mkString(Source.scala:178) at scala.collection.TraversableOnce$class.mkString(TraversableOnce.scala:288) at scala.io.Source.mkString(Source.scala:178) at scala.collection.TraversableOnce$class.mkString(TraversableOnce.scala:290) at scala.io.Source.mkString(Source.scala:178) at scoverage.report.CodeGrid.source(CodeGrid.scala:63) at scoverage.report.CodeGrid.<init>(CodeGrid.scala:17) at scoverage.report.ScoverageHtmlWriter.filePage(ScoverageHtmlWriter.scala:78) at scoverage.report.ScoverageHtmlWriter.scoverage$report$ScoverageHtmlWriter$$writeFile(ScoverageHtmlWriter.scala:44) at scoverage.report.ScoverageHtmlWriter$$anonfun$scoverage$report$ScoverageHtmlWriter$$writePackage$1.apply(ScoverageHtmlWriter.scala:37) at scoverage.report.ScoverageHtmlWriter$$anonfun$scoverage$report$ScoverageHtmlWriter$$writePackage$1.apply(ScoverageHtmlWriter.scala:37) at scala.collection.immutable.List.foreach(List.scala:318) at scoverage.report.ScoverageHtmlWriter.scoverage$report$ScoverageHtmlWriter$$writePackage(ScoverageHtmlWriter.scala:37) at scoverage.report.ScoverageHtmlWriter$$anonfun$write$1.apply(ScoverageHtmlWriter.scala:27) at scoverage.report.ScoverageHtmlWriter$$anonfun$write$1.apply(ScoverageHtmlWriter.scala:27) at scala.collection.immutable.List.foreach(List.scala:318) at scoverage.report.ScoverageHtmlWriter.write(ScoverageHtmlWriter.scala:27) at scoverage.ScoverageSbtPlugin$.scoverage$ScoverageSbtPlugin$$writeReports(ScoverageSbtPlugin.scala:178) at scoverage.ScoverageSbtPlugin$$anonfun$coverageReport0$1.apply(ScoverageSbtPlugin.scala:70) at scoverage.ScoverageSbtPlugin$$anonfun$coverageReport0$1.apply(ScoverageSbtPlugin.scala:61) at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47) at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40) at sbt.std.Transform$$anon$4.work(System.scala:63) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228) at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228) at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17) at sbt.Execute.work(Execute.scala:237) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228) at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228) at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159) at sbt.CompletionService$$anon$2.call(CompletionService.scala:28) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) [error] (*:coverageReport) java.nio.charset.UnmappableCharacterException: Input length = 1 [error] Total time: 4 s, completed Nov 30, 2016 5:28:00 PM
I have attached the scoverage.coverage.xml file
Could you please provide a workaround or fix it if possible?
Thanks a lot.

[gslowikowski]

Your system encoding does not match the encoding of source files.

You have to add Seq("-encoding", "proper_encoding") to scalacOptions setting in build.sbt file (where "proper_encoding" is encoding used in source files) or fix sources if encoding of non-ascii characters is not consistent.

[tamasmartin]

Thank you @gslowikowski , it saved me.