diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/compiler/scala/reflect/internal/transform/Erasure.scala | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/compiler/scala/reflect/internal/transform/Erasure.scala b/src/compiler/scala/reflect/internal/transform/Erasure.scala index 1b323f839b..5beec70d62 100644 --- a/src/compiler/scala/reflect/internal/transform/Erasure.scala +++ b/src/compiler/scala/reflect/internal/transform/Erasure.scala @@ -17,7 +17,14 @@ trait Erasure { * with primitive as well as class types)?. */ private def genericCore(tp: Type): Type = tp.normalize match { - case TypeRef(_, sym, _) if sym.isAbstractType && !sym.owner.isJavaDefined => + /* A Java Array<T> is erased to Array[Object] (T can only be a reference type), where as a Scala Array[T] is + * erased to Object. However, there is only symbol for the Array class. So to make the distinction between + * a Java and a Scala array, we check if the owner of T comes from a Java class. + * This however caused issue SI-5654. The additional test for EXSITENTIAL fixes it, see the ticket comments. + * In short, members of an existential type (e.g. `T` in `forSome { type T }`) can have pretty arbitrary + * owners (e.g. when computing lubs, <root> is used). All packageClass symbols have `isJavaDefined == true`. + */ + case TypeRef(_, sym, _) if sym.isAbstractType && (!sym.owner.isJavaDefined || sym.hasFlag(Flags.EXISTENTIAL)) => tp case ExistentialType(tparams, restp) => genericCore(restp) |