sway: Sway sometimes crashes on reload

Please fill out the following:

• Sway Version:

  • sway version 1.6.1-3b1effdf (Sep 15 2021, branch 'makepkg'), built with the hidpi patch set against the 1.6.1 tag using https://aur.archlinux.org/packages/sway-hidpi-git/
  • wlroots is version 0.14.1.r0.g49a57442-1, built with the corresponding hidpi patch set against the 0.14.1 tag using https://aur.archlinux.org/packages/wlroots-hidpi-git/
  • xorg-xwayland-hidpi-git version 21.1.2.r251.g735dbde48-1, built with the corresponding hidpi patch set, latest build using https://aur.archlinux.org/packages/xorg-xwayland-hidpi-git/

• Debug Log:

  • These are the logs generated by sway after I hit reload, including its crash https://gist.github.com/zsolt-donca/6784b19d2608e614890b0339e029c0a7
  • note that the logs are decorated by journalctl, as I’m running sway as a systemd user service

• Configuration File:

  • My actual sway config: https://gist.github.com/zsolt-donca/dfd1f9b8f411b99e411b72187c9c2d46
  • This is my actual configuration; I’m sorry that it’s not minimal, but I could never not manage to consistently reproduce this issue and thus experiment with different configurations

• Stack Trace:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/bin/sway -d'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fb4b3ce5078 in wl_event_loop_dispatch () from /usr/lib/libwayland-server.so.0
[Current thread is 1 (Thread 0x7fb4b2d15940 (LWP 2248))]
(gdb) bt full
#0  0x00007fb4b3ce5078 in wl_event_loop_dispatch () at /usr/lib/libwayland-server.so.0
#1  0x00007fb4b3ce2be7 in wl_display_run () at /usr/lib/libwayland-server.so.0
#2  0x00005556b5c14979 in server_run (server=0x5556b5c8b100 <server>) at ../sway/sway/server.c:254
        config_path = 0x0
        usage = 0x5556b5c6d250 "Usage: sway [options] [command]\n\n  -h, --help", ' ' <repeats 13 times>, "Show help message and quit.\n  -c, --config <config>  Specify a config file.\n  -C, --validate         Check the validity of the config file, th"...
        c = <optimized out>
        long_options = 
            {{name = 0x5556b5c6c33c "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x5556b5c70c18 "config", has_arg = 1, flag = 0x0, val = 99}, {name = 0x5556b5c6c341 "validate", has_arg = 0, flag = 0x0, val = 67}, {name = 0x5556b5c6c34a "debug", has_arg = 0, flag = 0x0, val = 100}, {name = 0x5556b5c6bf00 "version", has_arg = 0, flag = 0x0, val = 118}, {name = 0x5556b5c6b90f "verbose", has_arg = 0, flag = 0x0, val = 86}, {name = 0x5556b5c6c350 "get-socketpath", has_arg = 0, flag = 0x0, val = 112}, {name = 0x5556b5c6c35f "unsupported-gpu", has_arg = 0, flag = 0x0, val = 117}, {name = 0x5556b5c6c36f "my-next-gpu-wont-be-nvidia", has_arg = 0, flag = 0x0, val = 117}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
        validate = 0
        debug = 1
        allow_unsupported_gpu = 0
        verbose = 0
#3  main (argc=<optimized out>, argv=0x7ffe9b7036e8) at ../sway/sway/main.c:433
        config_path = 0x0
        usage = 0x5556b5c6d250 "Usage: sway [options] [command]\n\n  -h, --help", ' ' <repeats 13 times>, "Show help message and quit.\n  -c, --config <config>  Specify a config file.\n  -C, --validate         Check the validity of the config file, th"...
        c = <optimized out>
        long_options = 
            {{name = 0x5556b5c6c33c "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x5556b5c70c18 "config", has_arg = 1, flag = 0x0, val = 99}, {name = 0x5556b5c6c341 "validate", has_arg = 0, flag = 0x0, val = 67}, {name = 0x5556b5c6c34a "debug", has_arg = 0, flag = 0x0, val = 100}, {name = 0x5556b5c6bf00 "version", has_arg = 0, flag = 0x0, val = 118}, {name = 0x5556b5c6b90f "verbose", has_arg = 0, flag = 0x0, val = 86}, {name = 0x5556b5c6c350 "get-socketpath", has_arg = 0, flag = 0x0, val = 112}, {name = 0x5556b5c6c35f "unsupported-gpu", has_arg = 0, flag = 0x0, val = 117}, {name = 0x5556b5c6c36f "my-next-gpu-wont-be-nvidia", has_arg = 0, flag = 0x0, val = 117}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
        validate = 0
        debug = 1
        allow_unsupported_gpu = 0
        verbose = 0

• Description:
  • I just hit the key combination for reload (bindsym $mod+Shift+c reload), with several applications running (chrome beta, firefox, foot, spotify etc.); Sway did not immediately crash, but my whole system just froze momentarily (no mouse movement, no effect on me pressing the caps lock), after after a couple of seconds, sway crashed and quit (and I found myself at the TTY login).
  • Sway does not always crash on reload (some of my apps crash, though, like Firefox), so I cannot consistently reproduce this.