Index: generic/xotcl.c
===================================================================
diff -u -rcedbcd6a70c433f37525ad01e254895b600db08b -r018ced50b0b8139c67310d99f9541e933b7a1f2d
--- generic/xotcl.c	(.../xotcl.c)	(revision cedbcd6a70c433f37525ad01e254895b600db08b)
+++ generic/xotcl.c	(.../xotcl.c)	(revision 018ced50b0b8139c67310d99f9541e933b7a1f2d)
@@ -2222,18 +2222,21 @@
 XOTclCallStackFindLastInvocation(Tcl_Interp *interp, int offset) {
   XOTclCallStack *cs = &RUNTIME_STATE(interp)->cs;
   register XOTclCallStackContent *csc = cs->top;
-  int topLevel = csc->currentFramePtr ? Tcl_CallFrame_level(csc->currentFramePtr) :0;
+  int topLevel = csc->currentFramePtr ? Tcl_CallFrame_level(csc->currentFramePtr) : 0;
   int deeper = offset;
 
   /* skip through toplevel inactive filters, do this offset times */
   for (csc=cs->top; csc > cs->content; csc--) {
+      /* fprintf(stderr, "csc %p callType = %x, frameType = %x, offset=%d\n",
+         csc,csc->callType,csc->frameType,offset); */
     if ((csc->callType & XOTCL_CSC_CALL_IS_NEXT) ||
         (csc->frameType & XOTCL_CSC_TYPE_INACTIVE))
       continue;
     if (offset)
       offset--;
     else {
-      if (!deeper) {
+        /* fprintf(stderr, "csc %p offset ok, deeper=%d\n",csc,deeper); */
+      if (!deeper || cs->top->callType & XOTCL_CSC_CALL_IS_GUARD) {
         return csc;
       }
       if (csc->currentFramePtr && Tcl_CallFrame_level(csc->currentFramePtr) < topLevel) {
@@ -2242,6 +2245,7 @@
     }
   }
   /* for some reasons, we could not find invocation (topLevel, destroy) */
+  /* fprintf(stderr, "csc %p could not find invocation\n",csc);*/
   return NULL;
 }
 
@@ -3809,9 +3813,12 @@
   int rc = TCL_OK;
 
   if (clientData) {
+    XOTclCallStackContent *csc = CallStackGetTopFrame(interp);
     Tcl_Obj *res = Tcl_GetObjResult(interp); /* save the result */
     INCR_REF_COUNT(res);
 
+    csc->callType |= XOTCL_CSC_CALL_IS_GUARD;
+
     /* GuardPrint(interp, cmdList->clientData); */
     /*
      * ok, there is a guard ... we have to push a