--- a/mercurial/version.py
+++ b/mercurial/version.py
@@ -13,6 +13,7 @@ import os
import os.path
import re
import time
+import util
unknown_version = 'unknown'
remembered_version = False
@@ -37,7 +38,7 @@ def remember_version(version=None):
"""Store version information."""
global remembered_version
if not version and os.path.isdir(".hg"):
- f = os.popen("hg identify 2>/dev/null") # use real hg installation
+ f = os.popen("hg identify 2> %s" % util.nulldev) # use real hg installation
ident = f.read()[:-1]
if not f.close() and ident:
ids = ident.split(' ', 1)