diff options
| author | Alex Gaynor <alex.gaynor@gmail.com> | 2016-03-12 08:13:07 -0500 |
|---|---|---|
| committer | Alex Gaynor <alex.gaynor@gmail.com> | 2016-03-12 08:13:07 -0500 |
| commit | 139b85fcd15e846c16ed027d8402422a729d2b07 (patch) | |
| tree | c98f2dc437d84079a0d7d1c1833fa4af82d0fd1c /src | |
| parent | 5c66c183913b1f94930100bd0543b8533584a761 (diff) | |
| parent | 6c439aa5aadfa20e30dfd6172ac533d1891ddce8 (diff) | |
| download | cryptography-139b85fcd15e846c16ed027d8402422a729d2b07.tar.gz cryptography-139b85fcd15e846c16ed027d8402422a729d2b07.tar.bz2 cryptography-139b85fcd15e846c16ed027d8402422a729d2b07.zip | |
Merge pull request #2812 from reaperhulk/fix-2717
make multibackend error with an empty list.
Diffstat (limited to 'src')
| -rw-r--r-- | src/cryptography/hazmat/backends/multibackend.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/multibackend.py b/src/cryptography/hazmat/backends/multibackend.py index 65f18531..48bc7d08 100644 --- a/src/cryptography/hazmat/backends/multibackend.py +++ b/src/cryptography/hazmat/backends/multibackend.py @@ -28,6 +28,13 @@ class MultiBackend(object): name = "multibackend" def __init__(self, backends): + if len(backends) == 0: + raise ValueError( + "Multibackend cannot be initialized with no backends. If you " + "are seeing this error when trying to use default_backend() " + "please try uninstalling and reinstalling cryptography." + ) + self._backends = backends def _filtered_backends(self, interface): |