# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 1403549202 18000
# Node ID c20843aee8a4853d5bd310b37d7b0a1466ca0e89
# Parent  fb5f34bb3867c8ebf9f3288236300c7a1fceee59
branch: add debug message for branch cache write failure

diff -r fb5f34bb3867 -r c20843aee8a4 mercurial/branchmap.py
--- a/mercurial/branchmap.py	Sun May 04 22:36:07 2014 -0700
+++ b/mercurial/branchmap.py	Mon Jun 23 13:46:42 2014 -0500
@@ -221,7 +221,8 @@
             repo.ui.log('branchcache',
                         'wrote %s branch cache with %d labels and %d nodes\n',
                         repo.filtername, len(self), nodecount)
-        except (IOError, OSError, util.Abort):
+        except (IOError, OSError, util.Abort), inst:
+            repo.ui.debug("couldn't write branch cache: %s\n" % inst)
             # Abort may be raise by read only opener
             pass