Fix py3.2 specific EDEADLK related bug.

CHANGES

@@ -16,6 +16,7 @@ Version 0.13
 - Added cachedir support. CACHEDIR.TAG compatible cache directories
   can now be excluded using ``--exclude-caches`` (#74)
 - Fix crash on extreme mtime timestamps (year 2400+) (#81)
+- Fix Python 3.2 specific lockf issue (EDEADLK)
 
 Version 0.12
 ------------

attic/helpers.py

@@ -51,7 +51,8 @@ class UpgradableLock:
     def upgrade(self):
         try:
             fcntl.lockf(self.fd, fcntl.LOCK_EX)
-        except OSError as e:
+        # Python 3.2 raises IOError, Python3.3+ raises OSError
+        except (OSError):
             raise self.LockUpgradeFailed(self.path)
         self.is_exclusive = True