Index: generic/nsf.c
===================================================================
diff -u -r7ac9328ee6b3fd77da6da4235e10f29c3c4513de -r3696772f6383ca87f6f4c7716a12843afacdff2f
--- generic/nsf.c	(.../nsf.c)	(revision 7ac9328ee6b3fd77da6da4235e10f29c3c4513de)
+++ generic/nsf.c	(.../nsf.c)	(revision 3696772f6383ca87f6f4c7716a12843afacdff2f)
@@ -9176,7 +9176,7 @@
      */
     if (object->mixinStack) {
       if (cscPtr->frameType == NSF_CSC_TYPE_ACTIVE_MIXIN)
-        cscPtr->frameType = NSF_CSC_TYPE_INACTIVE;
+        cscPtr->frameType = NSF_CSC_TYPE_INACTIVE_MIXIN;
 
       /* otherwise move the command pointer forward */
       if (isMixinEntry) {
@@ -15319,6 +15319,7 @@
   if (object && (object->filterStack || object->mixinStack) ) {
     CallStackUseActiveFrame(interp, &ctx);
   }
+
   if (!Tcl_Interp_varFramePtr(interp)) {
     CallStackRestoreSavedFrames(interp, &ctx);
     return NsfVarErrMsg(interp, "instvar used on ", objectName(object),