# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 2011-03-05 01:21:12
# Node ID 4ec34de8bbb1e58eca9c52e141c212d58bad9ace
# Parent  67fbe566eff1c991921d66f836b73bd0549620a3

match: ignore "" patterns

The following command would visit every changeset in repo/ rather than
the last 10:

hg log -l 10 repo/

diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -261,6 +261,8 @@ def expandpats(pats):
     return ret
 
 def match(repo, pats=[], opts={}, globbed=False, default='relpath'):
+    if pats == ("",):
+        pats = []
     if not globbed and default == 'relpath':
         pats = expandpats(pats or [])
     m = matchmod.match(repo.root, repo.getcwd(), pats,