ok, i figured it out (i think). Here is the part of the output that i think is the interesting part:
(and the full output dartable_gdb_output.txt (23.4 KB) )
The german in the text “Kein passender Prozess gefunden.” means “No matching process found”
[New Thread 0x7ffd9ff8f6c0 (LWP 66627)]
[New Thread 0x7ffd9ef8d6c0 (LWP 66628)]
[Thread 0x7ffd9ff8f6c0 (LWP 66627) exited]
[Thread 0x7ffd9f78e6c0 (LWP 66626) exited]
[Thread 0x7ffd9ef8d6c0 (LWP 66628) exited]
Thread 11 "worker res 0" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc77fe6c0 (LWP 66292)]
0x00007fffc471f354 in _generate_curve_lut (pipe=<optimized out>, d=d@entry=0x7ffe5113f010)
at /home/robin/git/darktable/src/iop/rgbcurve.c:1565
1565 (void)dt_draw_curve_add_point(d->curve[ch], curve_nodes[ch][k].x, curve_nodes[ch][k].y);
(gdb) s
Thread 12 "worker res 1" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc6ffd6c0 (LWP 66293)]
0x00007fffc471f354 in _generate_curve_lut (pipe=<optimized out>, d=d@entry=0x7ffe3c015010)
at /home/robin/git/darktable/src/iop/rgbcurve.c:1565
1565 (void)dt_draw_curve_add_point(d->curve[ch], curve_nodes[ch][k].x, curve_nodes[ch][k].y);
(gdb)
Couldn't get registers: Kein passender Prozess gefunden.
(gdb)
Couldn't get registers: Kein passender Prozess gefunden.
(gdb)
Couldn't get registers: Kein passender Prozess gefunden.
(gdb)
Couldn't get registers: Kein passender Prozess gefunden.
(gdb) n
Couldn't get registers: Kein passender Prozess gefunden.
(gdb) [Thread 0x7ffdad2496c0 (LWP 66618) exited]
[Thread 0x7ffdada4a6c0 (LWP 66617) exited]
[Thread 0x7ffdae24b6c0 (LWP 66616) exited]