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py(deps) Bump libtmux 0.52.1 -> 0.53.0#1003

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libtmux-v0.53.0
Dec 14, 2025
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py(deps) Bump libtmux 0.52.1 -> 0.53.0#1003
tony merged 2 commits intomasterfrom
libtmux-v0.53.0

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@tony tony commented Dec 14, 2025 •
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Changes

libtmux 0.52.1 -> 0.53.0

Bug fix for session attaching

Bug fix for tmuxp load

User Experience

After running tmuxp load, users would see this traceback printed to their terminal after detaching:

Traceback (most recent call last):
  File "/home/d/.local/bin/tmuxp", line 7, in <module>
    sys.exit(cli.cli())
  ...
  File ".../tmuxp/cli/load.py", line 152, in _load_attached
    builder.session.attach()
  File ".../libtmux/session.py", line 332, in attach
    self.refresh()
  File ".../libtmux/neo.py", line 242, in fetch_obj
    raise exc.TmuxObjectDoesNotExist(...)
libtmux.exc.TmuxObjectDoesNotExist: Could not find object

Root Cause

The issue was caused by libtmux's Session.attach() calling refresh() after attach-session returned. Since attach-session is a blocking interactive command, the session state can change arbitrarily during attachment - including being killed entirely.

Timeline

  • Feb 2024: 9a5147aa - Session.attach() was added with the refresh() call
  • Nov 2025: tmuxp fdafdd2b switched from attach_session() to attach()
  • Users started experiencing the bug

Fix

The fix is in libtmux: tmux-python/libtmux#616

This PR adds a regression test to tmuxp to ensure the behavior is documented and tested.

@tony tony changed the title py(deps) Bump libtmux 0.52.1 -> 0.53.0a0 py(deps) Bump libtmux 0.52.1 -> 0.53.0 Dec 14, 2025
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codecov bot commented Dec 14, 2025 •
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.97%. Comparing base (1a55e88) to head (240d85f).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files 
@@           Coverage Diff           @@
##           master    #1003   +/-   ##
=======================================
  Coverage   72.97%   72.97%           
=======================================
  Files          26       26           
  Lines        1839     1839           
  Branches      347      347           
=======================================
  Hits         1342     1342           
  Misses        394      394           
  Partials      103      103

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@tony tony mentioned this pull request Dec 14, 2025
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@tony tony marked this pull request as ready for review December 14, 2025 12:08
@tony tony merged commit cebe172 into master Dec 14, 2025
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@tony tony deleted the libtmux-v0.53.0 branch December 14, 2025 12:10
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