gistfile1.txt

diff --git a/src/vm/jvm/runtime/org/perl6/nqp/runtime/Ops.java b/src/vm/jvm/runtime/org/perl6/nqp/runtime/Ops.java
index dbdf77a..6cbd229 100644
--- a/src/vm/jvm/runtime/org/perl6/nqp/runtime/Ops.java
+++ b/src/vm/jvm/runtime/org/perl6/nqp/runtime/Ops.java
@@ -4457,6 +4457,11 @@ public final class Ops {
     }
     public static SixModelObject setobjsc(SixModelObject obj, SixModelObject scRef, ThreadContext tc) {
         if (scRef instanceof SCRefInstance) {
+            if(System.getenv("DEBUG_PLS") != null && isconcrete(decont(obj, tc), tc) == 0) {
+                System.err.println("type object: " + typeName(obj, tc)
+                    + "  from SC: " + (obj.sc != null ? obj.sc.description : "null")
+                    + "  to SC: " + ((SCRefInstance)scRef).referencedSC.description);

+            }
             obj.sc = ((SCRefInstance)scRef).referencedSC;
             return obj;
         }