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7fdb45e0f8
closes #9274 ref #9028 If stdin closed then read_error_exit calls preserve_exit. Handling SIGHUP during preserve_exit would cause a premature teardown, and conflicts with e.g. ui_bridge_stop which waits for TUI to teardown. Vim ignores SIGHUP in its prepare_to_exit and getout_preserve_modified routines: /* Ignore SIGHUP, because a dropped connection causes a read error, which * makes Vim exit and then handling SIGHUP causes various reentrance * problems. */ signal(SIGHUP, SIG_IGN);