examples/input-method: crash in do_updates

[mozartilize]

---

wlroots has migrated to gitlab.freedesktop.org. This issue has been moved to:

https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/2790

[emersion]

Please provide more details, like a stack trace.

[mozartilize]

hi, I'm learning to write a input method and this is best I can do

❯ gdb build/examples/input-method
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Reading symbols from build/examples/input-method...
(gdb) run
Starting program: [...]/wlroots/build/examples/input-method 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Timer armed
Handle serial 1
Now active
content_type.purpose: TERMINAL
Update 0
Timer armed
Handle serial 2
Update 1
_Commit_Handle serial 3
Update 2

Program received signal SIGSEGV, Segmentation fault.
0x00005555555578b3 in do_updates () at ../examples/input-method.c:197
197         if (strcmp(current.surrounding.text, "_Commit_") != 0) {
(gdb) n

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb) q

[emersion]

Can you try "bt full"?

[mozartilize]

(gdb) bt full
#0  0x00005555555578b3 in do_updates () at ../examples/input-method.c:197
No locals.
#1  0x0000555555557bd5 in handle_done (data=0x0, zwp_input_method_v2=0x555555563c40) at ../examples/input-method.c:275
        prev_active = true
        default_state = {change_cause = ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_INPUT_METHOD, content_type = {hint = ZWP_TEXT_INPUT_V3_CONTENT_HINT_NONE, purpose = ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NORMAL}, surrounding = {
            text = 0x0, cursor = 0, anchor = 0}}
#2  0x00007ffff7db4acd in ?? () from /usr/lib/libffi.so.7
No symbol table info available.
#3  0x00007ffff7db403a in ?? () from /usr/lib/libffi.so.7
No symbol table info available.
#4  0x00007ffff7f90fe4 in ?? () from /usr/lib/libwayland-client.so.0
No symbol table info available.
#5  0x00007ffff7f8d563 in ?? () from /usr/lib/libwayland-client.so.0
No symbol table info available.
#6  0x00007ffff7f8ecac in wl_display_dispatch_queue_pending () from /usr/lib/libwayland-client.so.0
No symbol table info available.
#7  0x00005555555580de in main (argc=<optimized out>, argv=<optimized out>) at ../examples/input-method.c:388
        registry = <optimized out>
        display_fd = 3
        epoll = 5
        epoll_display = {events = 5, data = {ptr = 0x3, fd = 3, u32 = 3, u64 = 3}}
        epoll_timer = {events = 1, data = {ptr = 0x4, fd = 4, u32 = 4, u64 = 4}}
        caught = {events = 4, data = {ptr = 0x3, fd = 3, u32 = 3, u64 = 3}}
        __PRETTY_FUNCTION__ = "main"