segfault in arrange_workspace

[nicolasavru]

Please fill out the following:

• Sway Version:

  • swaymsg -t get_version or sway -v
    sway version 1.6-21d2fdf7 (Oct 31 2021, branch 'makepkg')

• Debug Log:
  https://gist.github.com/nicolasavru/353233a1dff49dc5c444ee738cad6f95

• Configuration File:
  In the same gist as the debug log.

• Stack Trace:

(gdb) bt full
#0  0x0000560e4ca78d1c in arrange_workspace (workspace=0x0) at ../sway/sway/tree/arrange.c:257
        output = 0x560e4d700670
        area = 0x560e4d700710
        first_arrange = false
        prev_x = 0
        prev_y = 2190
        diff_x = 0
        diff_y = 0
#1  0x0000560e4ca66a65 in cmd_move_in_direction (direction=WLR_DIRECTION_UP, argc=0, argv=0x560e4da939c0) at ../sway/sway/commands/move.c:754
        move_amt = 10
        container = 0x560e4daab250
        old_ws = 0x560e4cbc4bf0
        old_parent = 0x560e4daa5610
        new_ws = 0x0
#2  0x0000560e4ca676ae in cmd_move (argc=0, argv=0x560e4da939c0) at ../sway/sway/commands/move.c:1003
        error = 0x0
        no_auto_back_and_forth = false
#3  0x0000560e4ca260cc in execute_command (_exec=0x560e4da24360 "[con_id=\"25\"] layout toggle split;[con_id=\"25\"] move up", seat=0x560e4d2ea820, con=0x0) at ../sway/sway/commands.c:305
        container = 0x560e4daab250
        res = 0x560e4da3cf10
        i = 0
        fail_res = 0x0
        argc = 2
        argv = 0x560e4da939b0
        handler = 0x560e4caa9fc0 <command_handlers+160>
        cmd = 0x560e4daea1c0 "move up"
        matched_delim = 0 '\000'
        containers = 0x560e4dac3d60
        using_criteria = true
        exec = 0x560e4daea190 "[con_id=\"25\"] layout toggle split"
        head = 0x0
        res_list = 0x560e4da314c0
        __PRETTY_FUNCTION__ = "execute_command"
#4  0x0000560e4ca32613 in ipc_client_handle_command (client=0x560e4da96910, payload_length=55, payload_type=IPC_COMMAND) at ../sway/sway/ipc-server.c:645
        line = 0x560e4da24360 "[con_id=\"25\"] layout toggle split;[con_id=\"25\"] move up"
        res_list = 0x217
        json = 0xa2 <error: Cannot access memory at address 0xa2>
        length = 0
        buf = 0x560e4da24360 "[con_id=\"25\"] layout toggle split;[con_id=\"25\"] move up"
        __PRETTY_FUNCTION__ = "ipc_client_handle_command"
#5  0x0000560e4ca311bc in ipc_client_handle_readable (client_fd=162, mask=1, data=0x560e4da96910) at ../sway/sway/ipc-server.c:267
        pending_length = 55
        pending_type = IPC_COMMAND
        client = 0x560e4da96910
        read_available = 69
        buf = "i3-ipc7\000\000\000\000\000\000"
        received = 14
#6  0x00007f835d4dc04a in wl_event_loop_dispatch () at /usr/lib/libwayland-server.so.0
#7  0x00007f835d4d9bc7 in wl_display_run () at /usr/lib/libwayland-server.so.0
#8  0x0000560e4ca355a2 in server_run (server=0x560e4caac600 <server>) at ../sway/sway/server.c:285
#9  0x0000560e4ca34897 in main (argc=2, argv=0x7ffe3ad10308) at ../sway/sway/main.c:427
        config_path = 0x0
        usage = 0x560e4ca92298 "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 = -1
        verbose = 0
        allow_unsupported_gpu = 0
        debug = 1
        validate = 0
        long_options = 
            {{name = 0x560e4ca8f055 "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x560e4ca8f8cf "config", has_arg = 1, flag = 0x0, val = 99}, {name = 0x560e4ca8f05a "validate", has_arg = 0, flag = 0x0, val = 67}, {name = 0x560e4ca8f063 "debug", has_arg = 0, flag = 0x0, val = 100}, {name = 0x560e4ca8ef55 "version", has_arg = 0, flag = 0x0, val = 118}, {name = 0x560e4ca8eb3b "verbose", has_arg = 0, flag = 0x0, val = 86}, {name = 0x560e4ca8f069 "get-socketpath", has_arg = 0, flag = 0x0, val = 112}, {name = 0x560e4ca8f078 "unsupported-gpu", has_arg = 0, flag = 0x0, val = 117}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
(gdb) print workspace
$4 = (struct sway_workspace *) 0x0
(gdb) up 1
#1  0x0000560e4ca66a65 in cmd_move_in_direction (direction=WLR_DIRECTION_UP, argc=0, argv=0x560e4da939c0) at ../sway/sway/commands/move.c:754
754	../sway/sway/commands/move.c: No such file or directory.
(gdb) print container->pending
$5 = {layout = L_HORIZ, x = 0, y = 2190, width = 0, height = 0, fullscreen_mode = FULLSCREEN_NONE, workspace = 0x0, parent = 0x0, children = 0x560e4dac5570, focused_inactive_child = 0x0, focused = false, border = B_NONE, border_thickness = 0, border_top = false, border_bottom = false, border_left = false, border_right = false, content_x = 0, content_y = 0, content_width = 0, content_height = 0}
(gdb) 

• Description:
  With 3 windows in a workspace, have a script perform a sequence of split/move commands (I can reconstruct the exact sequence if we really need it) via ipc, ctrl+c the script, start it again so it starts listening, and then have it perform another sequence of split/moves commands.