Starting program: /usr/local/bin/gtk4-demo
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffee092700 (LWP 3790)]
[New Thread 0x7fffed891700 (LWP 3791)]
[New Thread 0x7fffdbd11700 (LWP 3792)]
[New Thread 0x7fffdb2e2700 (LWP 3793)]
[New Thread 0x7fffd9556700 (LWP 3794)]
[New Thread 0x7fffd1b87700 (LWP 3795)]
[New Thread 0x7fffd1386700 (LWP 3796)]
[New Thread 0x7fffbe782700 (LWP 3797)]
[Thread 0x7fffbe782700 (LWP 3797) exited]
[New Thread 0x7fffbe782700 (LWP 3798)]
[New Thread 0x7fffbdf81700 (LWP 3799)]
[New Thread 0x7fffbd63f700 (LWP 3800)]
[New Thread 0x7fffbce3e700 (LWP 3801)]
[Thread 0x7fffbdf81700 (LWP 3799) exited]
[New Thread 0x7fffbdf81700 (LWP 3802)]
[New Thread 0x7fffaf423700 (LWP 3803)]
[New Thread 0x7fffaec22700 (LWP 3804)]
[New Thread 0x7fffae421700 (LWP 3805)]
[New Thread 0x7fffadc20700 (LWP 3806)]
[Thread 0x7fffadc20700 (LWP 3806) exited]
[New Thread 0x7fffad41f700 (LWP 3807)]
[New Thread 0x7fffadc20700 (LWP 3808)]
[New Thread 0x7fffacadd700 (LWP 3809)]
[New Thread 0x7fff93fff700 (LWP 3810)]
[Thread 0x7fffadc20700 (LWP 3808) exited]
**
Gsk:ERROR:../gsk/gl/gskgldriver.c:341:create_texture: assertion failed: (height > 0)

Thread 1 "gtk4-demo" received signal SIGABRT, Aborted.
0x00007ffff4d7686b in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff4d7686b in raise () at /usr/lib/libc.so.6
#1  0x00007ffff4d6140e in abort () at /usr/lib/libc.so.6
#2  0x00007ffff7167b76 in g_assertion_message () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff7167bdc in g_assertion_message_expr () at /usr/lib/libglib-2.0.so.0
#4  0x00007ffff78511c7 in  () at /usr/lib/libgtk-4.so.0.9400.0
#5  0x00007ffff7851d7b in  () at /usr/lib/libgtk-4.so.0.9400.0
#6  0x00007ffff784b01a in  () at /usr/lib/libgtk-4.so.0.9400.0
#7  0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#8  0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#9  0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#10 0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#11 0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#12 0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#13 0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#14 0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#15 0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#16 0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#17 0x00007ffff784a726 in  () at /usr/lib/libgtk-4.so.0.9400.0
#18 0x00007ffff784bbca in  () at /usr/lib/libgtk-4.so.0.9400.0
#19 0x00007ffff784d6fd in  () at /usr/lib/libgtk-4.so.0.9400.0
#20 0x00007ffff784e7e5 in  () at /usr/lib/libgtk-4.so.0.9400.0
#21 0x00007ffff783a78d in gsk_renderer_render () at /usr/lib/libgtk-4.so.0.9400.0
#22 0x00007ffff76c74a5 in  () at /usr/lib/libgtk-4.so.0.9400.0
#23 0x00007ffff75a7f12 in gtk_main_do_event () at /usr/lib/libgtk-4.so.0.9400.0
#24 0x00007ffff77e25ab in  () at /usr/lib/libgtk-4.so.0.9400.0
#25 0x00007ffff6eafa4d in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#26 0x00007ffff6ec2e40 in  () at /usr/lib/libgobject-2.0.so.0
#27 0x00007ffff6ecb6f6 in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#28 0x00007ffff6ecc130 in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#29 0x00007ffff77e7ef1 in  () at /usr/lib/libgtk-4.so.0.9400.0
#30 0x00007ffff7140cb3 in  () at /usr/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#31 0x00007ffff71401d6 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#32 0x00007ffff71405b1 in  () at /usr/lib/libglib-2.0.so.0
#33 0x00007ffff714063e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#34 0x00007ffff6ba297e in g_application_run () at /usr/lib/libgio-2.0.so.0
#35 0x0000555555578b51 in main (argc=1, argv=0x7fffffffe5a8) at ../demos/gtk-demo/main.c:1233