Dont forget to *skip* t h e m . .

Author: Clyybber

compiler/transf.nim

@@ -1136,7 +1136,8 @@ proc transform(c: PTransf, n: PNode): PNode =
       assert n[i].kind == nkExprColonExpr
       result.add transform(c, newTree(nkAsgn, makeFieldTree(obj, n[i][0]), n[i][1]))
       providedFields.add n[i][0].sym
-    result.add transform(c, initDefaultFields(obj, (if obj.typ.kind == tyRef: obj.typ[0].n else: obj.typ.n), providedFields))
+    let typ = obj.typ.skipTypes(abstractInst)
+    result.add transform(c, initDefaultFields(obj, (if typ.kind == tyRef: typ[0].n else: typ.n), providedFields))
     n.sons.setLen(1)
     result.add obj
   else: