Fix Java lookups

Author: BarkingBad

scaladoc-testcases/src/tests/lookupInheritedMembers.scala

@@ -15,6 +15,15 @@ package lookupInheritedMembers {
    * [[tests.lookupInheritedMembers.pack2.B.x]]
    * [[tests.lookupInheritedMembers.pack2.B.y]]
    * [[tests.lookupInheritedMembers.pack2.B.MyType]]
+   *
    */
   class LookupInheritedMembers
+
+  /**
+   * This look up is problematic, because is lazyloaded by dotty.
+   *
+   * [[java.util.Formatter]]
+   */
+  class JavaInheritedMembers
 }
+

scaladoc/src/dotty/tools/scaladoc/tasty/comments/MemberLookup.scala

@@ -103,13 +103,15 @@ trait MemberLookup {
     members.asInstanceOf[Iterator[Symbol]]
   }
 
-  private def hackIsNotAbsent(using Quotes)(rsym: quotes.reflect.Symbol) = {
+  private def hackIsNotAbsent(using Quotes)(rsym: quotes.reflect.Symbol) =
     import dotty.tools.dotc
     given dotc.core.Contexts.Context = quotes.asInstanceOf[scala.quoted.runtime.impl.QuotesImpl].ctx
     val sym = rsym.asInstanceOf[dotc.core.Symbols.Symbol]
     // note: Predef has .info = NoType for some reason
-    sym.isCompleted && sym.info.exists
-  }
+    val iorc = sym.infoOrCompleter
+    iorc match
+      case _: dotc.core.SymDenotations.ModuleCompleter | dotc.core.SymDenotations.NoCompleter | dotc.core.Types.NoType | _: dotc.core.NoLoader => false
+      case _ => true
 
   private def localLookup(using Quotes)(
     sel: MemberLookup.Selector,

scaladoc/test/dotty/tools/scaladoc/tasty/comments/MemberLookupTests.scala

@@ -38,6 +38,9 @@ class LookupTestCases[Q <: Quotes](val q: Quotes) {
 
       "java.util.AbstractCollection" -> cls("java.util.AbstractCollection"),
       "java.lang.String" -> cls("java.lang.String"),
+      "java.util.Formatter" -> cls("java.util.Formatter"),
+      "java.io.Flushable" -> cls("java.io.Flushable"),
+      "java.util.List" -> cls("java.util.List"),
 
       "tests.lookupInheritedMembers.pack1.A.x" ->
         cls("tests.lookupInheritedMembers.pack1.A").fun("x"),