works - #1
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Aug 18, 2026
Problem:
TSan CI, always at exit:
WARNING: ThreadSanitizer: use of an invalid mutex (e.g. uninitialized or destroyed)
#1 uv_mutex_lock
#2 tui_flush src/nvim/tui/tui.c:1708
neovim#3 ui_client_event_flush
neovim#4 parse_msgpack src/nvim/msgpack_rpc/channel.c:259
...
neovim#10 event_teardown src/nvim/main.c:187
neovim#11 os_exit src/nvim/main.c:720
...
neovim#19 tinput_done_event src/nvim/tui/input.c:184
Analysis (guess):
`rpc_close_event()` may run during `event_teardown()` and reattach to
a restarted server, then `ui_client_attached=true` gets set and redraws
resume in an already-stopped TUI.
Solution:
Check `!exiting` in `rpc_close_event`, like we already do in
`channel_proc_exit_cb()`.
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