marmoute created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  Without this, in case of revlog name not matching any know pattern we would 
get
  a traceback. Raising a clear error seems simpler.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D11202

AFFECTED FILES
  mercurial/upgrade_utils/engine.py

CHANGE DETAILS

diff --git a/mercurial/upgrade_utils/engine.py 
b/mercurial/upgrade_utils/engine.py
--- a/mercurial/upgrade_utils/engine.py
+++ b/mercurial/upgrade_utils/engine.py
@@ -64,7 +64,12 @@
         )
     else:
         # drop the extension and the `data/` prefix
-        path = path.rsplit(b'.', 1)[0].split(b'/', 1)[1]
+        path_part = path.rsplit(b'.', 1)[0].split(b'/', 1)
+        if len(path_part) < 2:
+            msg = _('cannot recognize revlog from filename: %s')
+            msg %= path
+            raise error.Abort(msg)
+        path = path_part[1]
         return filelog.filelog(repo.svfs, path)
 
 



To: marmoute, #hg-reviewers
Cc: mercurial-patches, mercurial-devel
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