diff options
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): |