Comment 30 for bug 1853266

umockdev's test suite now started to see this crash in current Ubuntu jammy. Simple reproducer:

$ cat tests/xorg-dummy.conf
Section "Device"
 Identifier "test"
 Driver "dummy"
EndSection

$ Xorg -config tests/xorg-dummy.conf -logfile /tmp/log -once :5

Then, run at least one query on it, like this:

$ env DISPLAY=:5 xinput

Then pkill/kill or Control-C the Xorg process, and it will crash:

double free or corruption (!prev)
(EE)
(EE) Backtrace:
(EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x55e2b1c75d39]
(EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (__sigaction+0x50) [0x7f384162f520]
(EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (pthread_kill+0xf8) [0x7f3841683808]
(EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (raise+0x16) [0x7f384162f476]
(EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (abort+0xd7) [0x7f38416157b7]
(EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__fsetlocking+0x426) [0x7f38416765e6]
(EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (timer_settime+0x2cc) [0x7f384168dadc]
(EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (__default_morecore+0x8bc) [0x7f384168f84c]
(EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (free+0x55) [0x7f3841691ce5]
(EE) 9: /usr/lib/xorg/Xorg (config_fini+0x402) [0x55e2b1b6cb22]
(EE) 10: /usr/lib/xorg/Xorg (ddxGiveUp+0x62) [0x55e2b1b4fa22]
(EE) 11: /usr/lib/xorg/Xorg (InitFonts+0x669) [0x55e2b1b12d69]
(EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_init_first+0x90) [0x7f3841616fd0]
(EE) 13: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0x7d) [0x7f384161707d]
(EE) 14: /usr/lib/xorg/Xorg (_start+0x2e) [0x55e2b1afbf0e]
(EE)
(EE) Received signal 6 sent by process 520, uid 0

After that it hangs and can't be cleaned up any more (zombie)