swayimg segfaults when decoding /dev/zero or /dev/null

[vursc]

Steps to reproduce:

$ swayimg /dev/zero
Segmentation fault (core dumped)

$ swayimg /dev/null
Segmentation fault (core dumped)

I inspected the format-independent code for loading the image and found nothing suspicious, and suspect that it is some detect_<format>'s fault.

GDB list pointed to some nonexistent header file /usr/src/debug/gcc/gcc/libgcc/emutls.c. Not sure what this means.

(Zstd-compressed) core dumps: core_dumps.zip

[artemsen]

Just curious, why open /dev/null in swayimg?

[vursc]

Not really /dev/null... I accidentally opened an empty file (created by a faulty image format conversion). Thanks for the quick fix!

[vursc]

Just realized that /dev/zero has size zero... Should have noticed that earlier :P