Index: generic/nsf.c
===================================================================
diff -u -rb1b90edd0eda80223fa49ac604a3b38e63df01fb -ra695cb72c6594bae8b7abb49b76c0ee7b5367b7f
--- generic/nsf.c	(.../nsf.c)	(revision b1b90edd0eda80223fa49ac604a3b38e63df01fb)
+++ generic/nsf.c	(.../nsf.c)	(revision a695cb72c6594bae8b7abb49b76c0ee7b5367b7f)
@@ -9388,10 +9388,13 @@
     } else {
       shift = 1;
     }
+    if (shift >= objc) {
+      return NsfPrintError(interp, "no method name specified");
+    }
     methodObj = objv[shift];
     methodName = ObjStr(methodObj);
     if (FOR_COLON_RESOLVER(methodName)) {
-      return NsfPrintError(interp, "%s: methodname '%s' must not start with a colon",
+      return NsfPrintError(interp, "%s: method name '%s' must not start with a colon",
 			   ObjectName(object), methodName);
     }
   }