Mercurial: fixed a case of lookup branches that had 40 characters in length.

vcsserver/hg.py

@@ -609,6 +609,7 b' class HgRemote(RemoteBase):'
     @reraise_safe_exceptions
     def lookup(self, wire, revision, both):
         cache_on, context_uid, repo_id = self._cache_on(wire)
+
         @self.region.conditional_cache_on_arguments(condition=cache_on)
         def _lookup(_context_uid, _repo_id, _revision, _both):
 

vcsserver/hgcompat.py

@@ -67,7 +67,7 b' from mercurial.url import httpbasicauthh'
 def get_ctx(repo, ref):
     try:
         ctx = repo[ref]
-    except ProgrammingError:
+    except (ProgrammingError, TypeError):
         # we're unable to find the rev using a regular lookup, we fallback
         # to slower, but backward compat revsymbol usage
         ctx = revsymbol(repo, ref)