util.makedirs: propagate chmod exceptions

The existing exception handling was intended to handle mkdir errors. Strange
chmod exceptions could thus have strange consequences - or be swallowed.

mercurial/util.py

@@ -783,9 +783,6 b' def makedirs(name, mode=None):'
     parent = os.path.abspath(os.path.dirname(name))
     try:
         os.mkdir(name)
-        if mode is not None:
-            os.chmod(name, mode)
-        return
     except OSError, err:
         if err.errno == errno.EEXIST:
             return
@@ -793,6 +790,8 b' def makedirs(name, mode=None):'
             raise
     makedirs(parent, mode)
     makedirs(name, mode)
+    if mode is not None:
+        os.chmod(name, mode)
 
 def readfile(path):
     fp = open(path, 'rb')