# HG changeset patch
# User Brendan Cully <brendan@kublai.com>
# Date 1183846168 25200
# Node ID 9a45e1597d0840da7f8bf67c4061912db43632c3
# Parent  7031d9e2fa4555f3ae8bd4abb4c91b006101e2d4# Parent  035489f608429e469bbe015c586c4c4194c21744
Merge with crew

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -834,7 +834,7 @@ def debuginstall(ui):
     '''test Mercurial installation'''
 
     def writetemp(contents):
-        (fd, name) = tempfile.mkstemp()
+        (fd, name) = tempfile.mkstemp(prefix="hg-debuginstall-")
         f = os.fdopen(fd, "wb")
         f.write(contents)
         f.close()