# HG changeset patch
# User Benoit Boissinot <mercurial-bugs@selenic.com>
# Date 1130368256 25200
# Node ID f4250806dbeb5dbf8761accd7b508a16bc5add56
# Parent  6fbb13b7a59fc3f6cab865cb6e9bd634fcd854e4
further fix traceback on invalid .hgignore patterns

Please apply this little fix (matchfn return None if no patterns are
specified).



diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -246,6 +246,8 @@ def _matcher(canonroot, cwd, names, inc,
 
     def matchfn(pats, tail):
         """build a matching function from a set of patterns"""
+        if not pats:
+            return
         matches = []
         for k, p in pats:
             try: