# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2018-02-13 13:41:42
# Node ID fa4d333cac586fffe2ec0bd3faabe791b1a2ae08
# Parent  828f44cdfee38c7c1ea83ef0f0a6270974997c55

branchmap: wrap builtin exception in bytes for logging

Differential Revision: https://phab.mercurial-scm.org/D2224

diff --git a/mercurial/branchmap.py b/mercurial/branchmap.py
--- a/mercurial/branchmap.py
+++ b/mercurial/branchmap.py
@@ -377,7 +377,7 @@ class revbranchcache(object):
                 self._rbcrevs[:] = data
             except (IOError, OSError) as inst:
                 repo.ui.debug("couldn't read revision branch cache: %s\n" %
-                              inst)
+                              pycompat.bytestr(inst))
         # remember number of good records on disk
         self._rbcrevslen = min(len(self._rbcrevs) // _rbcrecsize,
                                len(repo.changelog))