Commit 95b0c60 (remote-bzr: add support for bzr repos) introduced a
regression by assuming all bzr remote repos are listable, but they are
not.

If they are not listable they are basically useless, so let's assume
there is no bzr repo.

Reported-by: Thorsten Kranzkowski <dl8...@dl8bcu.de>
Signed-off-by: Felipe Contreras <felipe.contre...@gmail.com>
---

We want this on master for v1.8.3.

 contrib/remote-helpers/git-remote-bzr | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/contrib/remote-helpers/git-remote-bzr 
b/contrib/remote-helpers/git-remote-bzr
index b295dd4..ad42317 100755
--- a/contrib/remote-helpers/git-remote-bzr
+++ b/contrib/remote-helpers/git-remote-bzr
@@ -840,6 +840,9 @@ def get_repo(url, alias):
 
     try:
         repo = origin.open_repository()
+        if not repo.user_transport.listable():
+            # this repository is not usable for us
+            raise bzrlib.errors.NoRepositoryPresent(repo.bzrdir)
     except bzrlib.errors.NoRepositoryPresent:
         # branch
 
-- 
1.8.3.rc2.542.g24820ba

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