Index: TODO
===================================================================
diff -u -ra660aaf6e696daa25336c6fbe1be90498d7f3607 -reaf3e9fdf5dd9b17e58f4d31e9c6a43e0cf907e7
--- TODO	(.../TODO)	(revision a660aaf6e696daa25336c6fbe1be90498d7f3607)
+++ TODO	(.../TODO)	(revision eaf3e9fdf5dd9b17e58f4d31e9c6a43e0cf907e7)
@@ -1588,6 +1588,8 @@
   to NSF_DESTROY_CALLED to distinguish between attempted
   and successful destroy method invocations (important for
   cleanup)
+- fix potential crash in 
+  ::nx::Object info method definition ::nsf::methods::object::instvar
 
 TODO: 
 - handing of xo::at_cleanup in serializer 
@@ -1604,12 +1606,6 @@
 - use term "callprotection" in documentation for public|protected
  (to be consistent with info command)
 
-get definition of ::nsf::methods::object::instvar
-should never happen, maybe someone deleted the alias (null) for object ::xo::Attribute
-procPtr 0x102ecd1c1 NsfObjDispatch 0x102ebe556 name instvar 
-alias instvar // ::xo::Attribute public alias instvar ::nsf::methods::object::instvar // 
-
-
 - extend coro regression test
 
 - subcmd
Index: generic/nsf.c
===================================================================
diff -u -r16ecd9a1e7a06eb966b2d51d4a1c59457ab25d11 -reaf3e9fdf5dd9b17e58f4d31e9c6a43e0cf907e7
--- generic/nsf.c	(.../nsf.c)	(revision 16ecd9a1e7a06eb966b2d51d4a1c59457ab25d11)
+++ generic/nsf.c	(.../nsf.c)	(revision eaf3e9fdf5dd9b17e58f4d31e9c6a43e0cf907e7)
@@ -1155,7 +1155,6 @@
       Tcl_DStringInit(dsPtr);
       Tcl_DStringAppend(dsPtr, methodName, objNameLength);
       regObject = GetObjectFromNsName(interp, Tcl_DStringValue(dsPtr), fromClassNS);
-      /*fprintf(stderr, "GetRegObject %s -> %p\n", Tcl_DStringValue(dsPtr), regObject);*/
       if (regObject) {
 	*methodName1 = procName;
       }
@@ -1263,9 +1262,11 @@
   } else if (*methodName == ':') {
     cmd = Tcl_GetCommandFromObj(interp, methodObj);
     referencedObject = GetRegObject(interp, cmd, methodName, methodName1, fromClassNS);
-    if (referencedObject) {
-      *regObject = referencedObject;
-      *defObject = referencedObject;
+    *regObject = referencedObject;
+    *defObject = referencedObject;
+    if (referencedObject == NULL) {
+      /* the cmd was not registered on an object or class */
+      cmd = NULL;
     }
   } else {
     *methodName1 = methodName;
@@ -15412,8 +15413,9 @@
   Tcl_DStringInit(dsPtr);
   cmd = ResolveMethodName(interp, class->nsPtr, methodNameObj, 
 			  dsPtr, &regObject, &defObject, &methodName1, &fromClassNS);
-  /*fprintf(stderr, "NsfClassInfoMethodMethod object %p regObject %p defObject %p fromClass %d\n",
-    &class->object,regObject,defObject,fromClassNS);*/
+  /*fprintf(stderr, 
+	  "NsfClassInfoMethodMethod object %p regObject %p defObject %p fromClass %d cmd %p\n",
+    &class->object,regObject,defObject,fromClassNS, cmd);*/
   result = ListMethod(interp, 
 		      regObject ? regObject : &class->object, 
 		      defObject ? defObject : &class->object,