More debug info

Author: odersky

compiler/src/dotty/tools/dotc/transform/ResolveSuper.scala

@@ -112,7 +112,7 @@ object ResolveSuper {
       sym = other.matchingDenotation(base.thisType, base.thisType.memberInfo(acc)).symbol
       bcs = bcs.tail
     }
-    assert(sym.exists, i"$acc with name ${acc.name.debugString}, ${unexpandedAccName.debugString}, starting rebindsuper from $base of ${acc.showLocated}: ${acc.info} in $bcs, name = $memberName")
+    assert(sym.exists, i"$acc with name ${acc.name.debugString}, is expanded: ${acc.is(ExpandedName)}, unexpanded: ${unexpandedAccName.debugString}, starting rebindsuper from $base of ${acc.showLocated}: ${acc.info} in $bcs, name = $memberName")
     sym
   }
 }