Index: generic/nsfStack.c
===================================================================
diff -u -re48161ab167236344f7d23da3e855c31d1a1ebc7 -r286401d1ba226b1fa0b060c43d296f1bb56e1aa2
--- generic/nsfStack.c	(.../nsfStack.c)	(revision e48161ab167236344f7d23da3e855c31d1a1ebc7)
+++ generic/nsfStack.c	(.../nsfStack.c)	(revision 286401d1ba226b1fa0b060c43d296f1bb56e1aa2)
@@ -273,8 +273,8 @@
             Tcl_CallFrame_clientData(framePtr),
             (unsigned long)Tcl_CallFrame_level(framePtr),
             (void *)Tcl_CallFrame_nsPtr(framePtr), Tcl_CallFrame_nsPtr(framePtr)->fullName,
-            Tcl_CallFrame_objc(framePtr) > 0u ? ObjStr(Tcl_CallFrame_objv(framePtr)[0]) : "(null)",
-            Tcl_CallFrame_objc(framePtr) > 0u ? (unsigned long)Tcl_CallFrame_objc(framePtr) : 0u);
+            Tcl_CallFrame_objc(framePtr) > 0 ? ObjStr(Tcl_CallFrame_objv(framePtr)[0]) : "(null)",
+            Tcl_CallFrame_objc(framePtr) > 0 ? (unsigned long)Tcl_CallFrame_objc(framePtr) : 0u);
     if (cscPtr != NULL) {
       fprintf(stderr, " csc %p frameType %.4x flags %.6x (%s.%p %s)\n",
               (void *)cscPtr,
@@ -658,7 +658,7 @@
 
   varFramePtr = (Tcl_CallFrame *)Tcl_Interp_varFramePtr(interp);
   if (likely(varFramePtr != NULL)) {
-    unsigned long lvl = Tcl_CallFrame_level(varFramePtr);
+    TCL_SIZE_T lvl = Tcl_CallFrame_level(varFramePtr);
 
     do {
       register unsigned int flags = (unsigned int)Tcl_CallFrame_isProcCallFrame(varFramePtr);