Passing NULL to wlr_keyboard_set_keymap results in a segfault. Example:

Thread 1 "dwl" received signal SIGSEGV, Segmentation fault. 0x00007ffff7e49b64 in xkb_keymap_ref () from /usr/lib/libxkbcommon.so.0 (gdb) bt #0 0x00007ffff7e49b64 in xkb_keymap_ref () at /usr/lib/libxkbcommon.so.0 #1 0x00007ffff7f06389 in wlr_keyboard_set_keymap () at /usr/lib/libwlroots.so.11 #2 0x000055555555bc54 in createkeyboard () #3 0x000055555555c283 in inputdevice () #4 0x00007ffff7e8101e in wl_signal_emit_mutable () at /usr/lib/libwayland-server.so.0 #5 0x00007ffff7e8101e in wl_signal_emit_mutable () at /usr/lib/libwayland-server.so.0 #6 0x00007ffff7edb52c in () at /usr/lib/libwlroots.so.11 #7 0x00007ffff7ee44b6 in () at /usr/lib/libwlroots.so.11 #8 0x000055555555fe66 in main ()