[PROTON-2563] local variable 'context' referenced before assignment

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: python-binding
• Assignee: Andrew Stitcher
• Reporter: Daniel Mewes
• Created: 14/Jun/22 17:53
• Updated: 12/Jul/22 09:40

Description

We're intermittently getting the following Python exception from qpid-proton:

UnboundLocalError: local variable 'context' referenced before assignment

The exception is raised in this line https://github.com/apache/qpid-proton/blob/0.37.0/python/proton/_events.py#L419 :

event = Event(impl, number, clsname, context) 

Looking at that code, there appears to be a clear bug in that the `context` local variable is only set in the `if cls` branch, but not in the `else` branch above.

Presumably, context should at least be set to `None` in the else branch to avoid this exception?