Created attachment 592534 [details, diff]
suggested patch from other forum to workaround librsvg bug
games-puzzle/gweled-0.9.1-r2 (~) segfaults on startup before opening first window.
f.g.o discussion: https://forums.gentoo.org/viewtopic-t-1101536.html
Launchpad discussion: https://bugs.launchpad.net/gweled/+bug/1741664
It looks like it has been rootcaused to be due to a librsvg bug that gweled abuses to crash. >=librsvg-2.42.3 (not currently in portage) fixes the bug, or a patch can be applied to gweled to deal with the broken librsvg. The patch copied/attached/tested here also improves gweled error handling regardless of librsvg used.
Applying the patch, the game seems to now play correctly with the current gnome-base/librsvg-2.40.20 (tested on amd64, x86)