From: andrewsh@debian.org   
      
   Control: reassign -1 src:sentry-python   
      
   Hello,   
      
   On Fri, 20 Feb 2026, at 17:15, Gena Byers wrote:   
   > On 2/20/26 4:54 PM, Andrej Shadura wrote:   
   >> Can you give me more details please?   
   >> I don’t see any mentions of this anywhere in the source.   
      
   > I don't know what the exact mechanism is but installing python3-eventlet    
   > renders matrix-synapse inoperable:   
      
   > "/usr/lib/python3/dist-packages/sentry_sdk/utils.py", line 1346, in    
   > _get_contextvars   
   > Feb 20 16:59:17 nexus python3[2979902]:     if not _is_contextvars_broken():   
   > Feb 20 16:59:17 nexus python3[2979902]:            ~~~~~~~~~~~~~~~~~~~~~~^^   
   > Feb 20 16:59:17 nexus python3[2979902]:   File    
   > "/usr/lib/python3/dist-packages/sentry_sdk/utils.py", line 1287, in    
   > _is_contextvars_broken   
   > Feb 20 16:59:17 nexus python3[2979902]:     from eventlet.patcher import    
   > is_monkey_patched  # type: ignore   
      
   Looks like something in the sentry SDK (which I think you should have   
   mentioned you enabled).   
      
   --    
   Cheers,   
     Andrej   
      
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