Error when unplugging keyboard

[avdv]

Hi.

I have a laptop with a secondary monitor and keyboard connected through a USB C dock. As soon as I unplug the cable, the illum daemon crashes:

illum-d: main-daemon.c:471: evdev_cb: Assertion `r == LIBEVDEV_READ_STATUS_SUCCESS' failed.

To debug this, I have added this code to main-daemon.c right before the assert statement:

                if (r != LIBEVDEV_READ_STATUS_SUCCESS) {
                   errno = -r;
                   perror("libevdev_next_event");
                }

here is the output:

sudo ./illum-d
<6>using /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight as a backlight
<6>using /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input0/event0 as an input dev
<6>using /sys/devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6.4/3-6.4.4/3-6.4.4.1/3-6.4.4.1:1.1/0003:046D:C548.000D/input/input34/event4 as an input dev
<6>using /sys/devices/pci0000:00/0000:00:14.0/usb3/3-6/3-6.4/3-6.4.4/3-6.4.4.2/3-6.4.4.2:1.2/0003:04D9:A131.0010/input/input39/event9 as an input dev
<6>using /sys/devices/platform/INTC1051:00/input/input13/event12 as an input dev
<6>using /sys/devices/platform/thinkpad_acpi/input/input17/event16 as an input dev
libevdev_next_event: No such device
illum-d: main-daemon.c:474: evdev_cb: Assertion `r == LIBEVDEV_READ_STATUS_SUCCESS' failed.
Aborted

Apparently, libevdev_next_event really does report other errors than the three values mentioned in the documentation.