diff -r 1f3acc30bdfe -r c2d9ef43ff6c mercurial/commands.py
--- a/mercurial/commands.py	Sun May 13 13:17:50 2012 +0200
+++ b/mercurial/commands.py	Sun May 13 13:18:06 2012 +0200
@@ -3775,7 +3775,7 @@
                 tr.close()
             if msgs:
                 repo.savecommitmessage('\n* * *\n'.join(msgs))
-        except:
+        except: # re-raises
             # wlock.release() indirectly calls dirstate.write(): since
             # we're crashing, we do not want to change the working dir
             # parent after all, so make sure it writes nothing