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c66a974f1d
setWindowSize is called from the render, frame and transport threads, but shellResize issues shell requests and, with the libdecor GTK plugin, renders the window decorations through pango, none of which is thread safe. A frame thread exiting after such a call crashed in the pango fontmap destructor during thread teardown. Publish the requested size atomically and wake the event loop through an eventfd registered in the epoll; the poll callback applies the size on the event-loop thread. Concurrent requests coalesce into the most recent one.