# HG changeset patch
# User Tony Tung <tonytung@merly.org>
# Date 2016-08-19 20:30:40
# Node ID bac1829ec31f469b03eed092fc751f742e6d5b27
# Parent  1316c7cccc76288274070c5f7dd68dd5dded2bec

util: checknlink should remove file it creates if an exception occurs

There's no reason to leave the file behind.

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -1341,6 +1341,10 @@ def checknlink(testfile):
     try:
         posixfile(f1, 'w').close()
     except IOError:
+        try:
+            os.unlink(f1)
+        except OSError:
+            pass
         return False
 
     f2 = testfile + ".hgtmp2"