Bug #2220: handle rlcompleter attribute match failure more gracefully.

(backport from r61275)

Lib/rlcompleter.py

@@ -125,7 +125,7 @@ class Completer:
         import re
         m = re.match(r"(\w+(\.\w+)*)\.(\w*)", text)
         if not m:
-            return
+            return []
         expr, attr = m.group(1, 3)
         object = eval(expr, self.namespace)
         words = dir(object)

Misc/NEWS

@@ -15,6 +15,8 @@ Core and builtins
 Library
 -------
 
+- Bug #2220: handle rlcompleter attribute match failure more gracefully.
+
 - Bug #1725737: In distutil's sdist, exclude RCS, CVS etc. also in the
   root directory, and also exclude .hg, .git, .bzr, and _darcs.