Index: generic/nsf.c
===================================================================
diff -u -rbbeae25530f12222c7d91b1d515a4faa14f39a2c -r9131bba5ac534e1a20a1af6e9a42b16e74984830
--- generic/nsf.c	(.../nsf.c)	(revision bbeae25530f12222c7d91b1d515a4faa14f39a2c)
+++ generic/nsf.c	(.../nsf.c)	(revision 9131bba5ac534e1a20a1af6e9a42b16e74984830)
@@ -14161,6 +14161,7 @@
 
         if (withinEnsemble) {
           pathObj = NsfMethodNamePath(interp, framePtr0, methodName);
+          INCR_REF_COUNT(pathObj);
           path = ObjStr(pathObj);
         } else {
           path = methodName;
@@ -20305,6 +20306,7 @@
                          &endOfFilterChain, &currentCmd) == TCL_OK
         && cmd != NULL) {
       Tcl_Obj *pathObj = NsfMethodNamePath(interp, framePtr, methodName);
+      INCR_REF_COUNT(pathObj);
 
       methodName = isEnsemble ? ObjStr(pathObj) : lookupMethodName;
       result = MethodHandleObj((class != NULL) ? (NsfObject *)class : object, (class == NULL), methodName);