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Don't crash if no asynchronous process has been created yet.

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* src/process.c (wait_reading_process_output): Allow
child_signal_read_fd < 0.
This commit is contained in:
Philipp Stephani 2021-01-10 17:59:29 +01:00
parent 8f0ce42d3e
commit df34ed8cbf
1 changed files with 2 additions and 2 deletions
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4
src/process.c
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@ -5413,9 +5413,9 @@ wait_reading_process_output (intmax_t time_limit, int nsecs, int read_kbd,
an asynchronous process. Otherwise this might deadlock if we
receive a SIGCHLD during `pselect'. */
int child_fd = child_signal_read_fd;
eassert (0 <= child_fd);
eassert (child_fd < FD_SETSIZE);
FD_SET (child_fd, &Available);
if (0 <= child_fd)
FD_SET (child_fd, &Available);
/* If frame size has changed or the window is newly mapped,
redisplay now, before we start to wait. There is a race