Index: generic/nsf.c
===================================================================
diff -u -rd007a8d7283d2861e0de5cfe567d540b8bd801de -r5b91151679ab9da9dae7e2480f9d7152637f72b6
--- generic/nsf.c	(.../nsf.c)	(revision d007a8d7283d2861e0de5cfe567d540b8bd801de)
+++ generic/nsf.c	(.../nsf.c)	(revision 5b91151679ab9da9dae7e2480f9d7152637f72b6)
@@ -18634,8 +18634,8 @@
 NsfProcStubDeleteProc(ClientData clientData) {
   NsfProcClientData *tcd = clientData;
 
-  fprintf(stderr, "NsfProcStubDeleteProc received %p\n", clientData);
-  /*fprintf(stderr, "... procName %s paramDefs %p\n", ObjStr(tcd->procName), tcd->paramDefs);*/
+  /* fprintf(stderr, "NsfProcStubDeleteProc received %p\n", clientData);
+  fprintf(stderr, "... procName %s paramDefs %p\n", ObjStr(tcd->procName), tcd->paramDefs);*/
   
   DECR_REF_COUNT2("procNameObj", tcd->procName);
   if (tcd->cmd != NULL) {
@@ -18690,7 +18690,7 @@
 
   fullMethodName = ObjStr(procNameObj);
   CheckCStack(interp, "nsfProc", fullMethodName);
-  /*fprintf(stderr, "=== InvokeShadowedProc %s objc %d\n", fullMethodName, objc);*/
+  /* fprintf(stderr, "=== InvokeShadowedProc %s objc %d\n", fullMethodName, objc); */
 
   /*
    * The code below is derived from the scripted method dispatch and just
@@ -18735,8 +18735,8 @@
   }
 
 #if defined(NRE)
-  /*fprintf(stderr, "CALL TclNRInterpProcCore proc '%s' %s nameObj %p %s\n",
-    ObjStr(objv[0]), fullMethodName, procNameObj, ObjStr(procNameObj));*/
+  /* fprintf(stderr, "CALL TclNRInterpProcCore proc '%s' %s nameObj %p %s\n", 
+     ObjStr(objv[0]), fullMethodName, procNameObj, ObjStr(procNameObj)); */
 
   Tcl_NRAddCallback(interp, ProcDispatchFinalize,
                     (ClientData)fullMethodName, pcPtr,
@@ -18861,13 +18861,19 @@
       Tcl_Command newCmdPtr = Tcl_GetCommandFromObj(interp, tcd->procName);
       
       if (unlikely(newCmdPtr == NULL)) {
-        return NsfPrintError(interp, "cannot lookup command '%s'",
-                             ObjStr(tcd->procName));
+        result = NsfPrintError(interp, "cannot lookup command '%s'",
+                               ObjStr(tcd->procName));
+        ParseContextRelease(pcPtr);
+        NsfTclStackFree(interp, pcPtr, "release parse context");
+        return result;
       }
       
       if (unlikely(!CmdIsProc(newCmdPtr))) {
-        return NsfPrintError(interp, "command '%s' is not a proc",
-                             ObjStr(tcd->procName));
+        result = NsfPrintError(interp, "command '%s' is not a proc",
+                               ObjStr(tcd->procName));
+        ParseContextRelease(pcPtr);
+        NsfTclStackFree(interp, pcPtr, "release parse context");
+        return result;
       }
       
       /*
Index: tests/nsf-cmd.test
===================================================================
diff -u -rd007a8d7283d2861e0de5cfe567d540b8bd801de -r5b91151679ab9da9dae7e2480f9d7152637f72b6
--- tests/nsf-cmd.test	(.../nsf-cmd.test)	(revision d007a8d7283d2861e0de5cfe567d540b8bd801de)
+++ tests/nsf-cmd.test	(.../nsf-cmd.test)	(revision 5b91151679ab9da9dae7e2480f9d7152637f72b6)
@@ -617,7 +617,7 @@
   namespace delete ::ns1
 }
 
-nx::test case nsf-proc-rename-delete {
+nx::test case nsf-proc-backstage-rename {
   namespace eval ::ns1 {}
   ? {info commands ::ns1::foo} ""
   ? {info commands ::nsf::procs::ns1::foo} ""
@@ -636,22 +636,72 @@
 
   ? {::ns1::foo -x ok} "1-ok"
 
-  rename [set x ::nsf::procs::ns1::foo] ""
+  rename ::nsf::procs::ns1::foo ""
 
   ? {info commands ::ns1::foo} "::ns1::foo"
   ? {info commands ::nsf::procs::ns1::foo} ""
   ? {info procs ::ns1::foo} ""
   ? {info procs ::nsf::procs::ns1::foo} ""
 
-  ? {::ns1::foo -x ok} {invalid command name "::ns1::foo"}
+  ? {::ns1::foo -x ok} {cannot lookup command '::nsf::procs::ns1::foo'}
 
+  rename ::ns1::foo ""
+
+  ? {info commands ::ns1::foo} ""
+  ? {info commands ::nsf::procs::ns1::foo} ""
+  ? {info procs ::ns1::foo} ""
+  ? {info procs ::nsf::procs::ns1::foo} ""
+
+  ? {::ns1::foo -x ok} {invalid command name "::ns1::foo"}
+  
   namespace eval ::ns1 {}
 }
 
+nx::test case nsf-proc-backstage-rename-2 {
+  namespace eval ::ns1 {}
+  ? {info commands ::ns1::foo} ""
+  ? {info commands ::nsf::procs::ns1::foo} ""
+  ? {info procs ::ns1::foo} ""
+  ? {info procs ::nsf::procs::ns1::foo} ""
 
-# - to-do interp hide/expose
+  ? {::ns1::foo -x ok} {invalid command name "::ns1::foo"}
+  
+  nsf::proc ::ns1::foo {
+    {-x:required}
+  } { return 1-$x }
+  ? {info commands ::ns1::foo} "::ns1::foo"
+  ? {info commands ::nsf::procs::ns1::foo} "::nsf::procs::ns1::foo"
+  ? {info procs ::ns1::foo} ""
+  ? {info procs ::nsf::procs::ns1::foo} "::nsf::procs::ns1::foo"
 
+  ? {::ns1::foo -x ok} "1-ok"
 
+  rename ::nsf::procs::ns1::foo ""
+  nx::Object create ::nsf::procs::ns1::foo
+
+  ? {info commands ::ns1::foo} "::ns1::foo"
+  ? {info commands ::nsf::procs::ns1::foo} "::nsf::procs::ns1::foo"
+  ? {info procs ::ns1::foo} ""
+  ? {info procs ::nsf::procs::ns1::foo} ""
+  
+  ? {::ns1::foo -x ok} {command '::nsf::procs::ns1::foo' is not a proc}
+
+  rename ::ns1::foo ""
+
+  ? {info commands ::ns1::foo} ""
+  ? {info commands ::nsf::procs::ns1::foo} "::nsf::procs::ns1::foo"
+  ? {info procs ::ns1::foo} ""
+  ? {info procs ::nsf::procs::ns1::foo} ""
+
+  ? {::ns1::foo -x ok} {invalid command name "::ns1::foo"}
+  
+  namespace eval ::ns1 {}
+  rename ::nsf::procs::ns1::foo ""
+}
+
+# - TO-DO: interp hide/expose
+
+
 #
 # Local variables:
 #    mode: tcl