Index: generic/nsfDebug.c
===================================================================
diff -u -r183cd0a9a3d2a37133ac51bb86952e1b522dbf6f -r67efaa622731c55726f20c509a775303bb99f4ff
--- generic/nsfDebug.c	(.../nsfDebug.c)	(revision 183cd0a9a3d2a37133ac51bb86952e1b522dbf6f)
+++ generic/nsfDebug.c	(.../nsfDebug.c)	(revision 67efaa622731c55726f20c509a775303bb99f4ff)
@@ -115,12 +115,13 @@
 
 void
 NsfStackDump(Tcl_Interp *interp) {
-  Interp     *iPtr = (Interp *)interp;
+  Interp     *iPtr;
   CallFrame  *f, *v;
   Tcl_Obj    *varCmdObj;
 
   nonnull_assert(interp != NULL);
 
+  iPtr = (Interp *)interp;
   f = iPtr->framePtr;
   v = iPtr->varFramePtr;
   varCmdObj = Tcl_NewObj();