--- a/ProtoObject.st	Wed Nov 30 16:23:21 2016 +0100
+++ b/ProtoObject.st	Wed Nov 30 16:58:18 2016 +0100
@@ -119,7 +119,27 @@
 %}.
     "/ fallBack for special objects & memoryAllocation failure case
 
-    ^ self error
+    ^ self error:'ProtoObject>>#shallowCopyOf: failed'
+! !
+
+!ProtoObject methodsFor:'StepInterruptContext'!
+
+inspect
+    "this method is required to allow inspection of the object"
+
+    ^ (Object compiledMethodAt:#inspect)
+        valueWithReceiver:self
+        arguments:nil
+        selector:#inspect
+!
+
+instVarAt:index
+    "this method is required to allow inspection of the object"
+
+    ^ (Object compiledMethodAt:#instVarAt:)
+        valueWithReceiver:self
+        arguments:{index}
+        selector:#instVarAt:
 ! !
 
 !ProtoObject methodsFor:'error handling'!
@@ -141,26 +161,6 @@
     ^ MessageNotUnderstood raiseRequestWith:aMessage
 ! !
 
-!ProtoObject methodsFor:'inspector support'!
-
-inspect
-    "this method is required to allow inspection of the object"
-
-    ^ (Object compiledMethodAt:#inspect)
-        valueWithReceiver:self
-        arguments:nil
-        selector:#inspect
-!
-
-instVarAt:index
-    "this method is required to allow inspection of the object"
-
-    ^ (Object compiledMethodAt:#instVarAt:)
-        valueWithReceiver:self
-        arguments:{index}
-        selector:#instVarAt:
-! !
-
 !ProtoObject methodsFor:'queries'!
 
 class
@@ -233,6 +233,10 @@
 
 !ProtoObject methodsFor:'testing'!
 
+isBridgeProxy
+    ^ false
+!
+
 ifNil:aBlock
     ^ self
 !