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Author SHA1 Message Date
Dylan Anderson 3f3fac8b65 chore(stackbar): tighten deadlock fix comment 2026-08-02 20:24:18 -07:00
Dylan Anderson 5a534eb2ac fix(stackbar): drop containers lock before repositioning stackbar 
Stackbar::update held STACKBARS_CONTAINERS across the synchronous
cross-thread SetWindowPos in position_window, while the stackbar wndproc
acquires the same lock on WM_LBUTTONDOWN. A tab click racing an update
storm leaves the wndproc blocked on the lock and the updater blocked in
SetWindowPos waiting on the wndproc's message pump, deadlocking the
whole process. Scope the guard to the insert so the lock is released
before SetWindowPos.

Fixes #1734
 2026-08-02 20:24:18 -07:00