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Handle asyncio.CancelledError in SSH session interaction#2072

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dnyanesh1011 wants to merge 3 commits into
prompt-toolkit:mainfrom
dnyanesh1011:fix-ssh-cancelled-error
Open

Handle asyncio.CancelledError in SSH session interaction#2072
dnyanesh1011 wants to merge 3 commits into
prompt-toolkit:mainfrom
dnyanesh1011:fix-ssh-cancelled-error

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@dnyanesh1011
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Fixes noisy traceback propagation during SSH session cancellation.

Currently _interact() catches BaseException, which also captures asyncio.CancelledError. In modern asyncio versions (especially Python 3.11+ / 3.13), CancelledError is expected control-flow during task shutdown and should not be treated as an application error.

This change:

  • handles asyncio.CancelledError explicitly
  • keeps normal application exceptions visible
  • avoids traceback spam during SSH disconnect/session cancellation
  • improves cancellation behavior when pressing Ctrl-C during the asyncssh example progress demo

Related issue: #1991


except asyncio.CancelledError:
# Expected during disconnect/shutdown.
pass
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Can you propagate rather than suppress using raise instead of pass?

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2 participants