diff --git a/internal/compiler-bridge/src/main/scala/xsbt/ExtractAPI.scala b/internal/compiler-bridge/src/main/scala/xsbt/ExtractAPI.scala index 2a24052976..f099000258 100644 --- a/internal/compiler-bridge/src/main/scala/xsbt/ExtractAPI.scala +++ b/internal/compiler-bridge/src/main/scala/xsbt/ExtractAPI.scala @@ -358,7 +358,17 @@ class ExtractAPI[GlobalType <: Global]( * TODO: can we include hashes for parent classes instead? This seems a bit messy. */ private def mkStructureWithInherited(info: Type, s: Symbol): xsbti.api.Structure = { - val ancestorTypes = linearizedAncestorTypes(info) + val ancestorTypes0 = linearizedAncestorTypes(info) + val ancestorTypes = + if (s.isDerivedValueClass) { + val underlying = s.derivedValueClassUnbox.tpe.finalResultType + // The underlying type of a value class should be part of the name hash + // of the value class (see the test `value-class-underlying`), this is accomplished + // by adding the underlying type to the list of parent types. + underlying :: ancestorTypes0 + } + else + ancestorTypes0 val decls = info.decls.toList val declsNoModuleCtor = if (s.isModuleClass) removeConstructors(decls) else decls val declSet = decls.toSet