--- a/mercurial/bookmarks.py Fri Nov 15 18:31:02 2013 -0800
+++ b/mercurial/bookmarks.py Fri Nov 15 18:41:40 2013 -0800
@@ -106,13 +106,13 @@
Set the name of the bookmark that we are on (hg update <bookmark>).
The name is recorded in .hg/bookmarks.current
'''
+ if mark not in repo._bookmarks:
+ raise AssertionError('bookmark %s does not exist!' % mark)
+
current = repo._bookmarkcurrent
if current == mark:
return
- if mark not in repo._bookmarks:
- mark = ''
-
wlock = repo.wlock()
try:
file = repo.opener('bookmarks.current', 'w', atomictemp=True)