file-roller keeps segfaulting while navigating into some archives. ark however doesn't fail with the same archive. lto is everywhere here when size shrinks. app-arch/libarchive does shrink so here. Cancelling lto seems to have fixed file-roller archive browsing. lto-filter is one of the feature I dislike the most. Not ny nature, but because it requires human will to monitor persistence of related issues. Such task gets easily underlooked. Reproducible: Always
Nevertheless filter-lto may be required here for a quite a while.
Your feelings are well-established, but let's focus on the matter at hand. Please provide emerge --info and a full backtrace of file-roller's crash (https://wiki.gentoo.org/wiki/Debugging#Per-package).
Although I tested back and forth yesterday with both file-roller & libarchive, I couldn't trigger it again once rebuild with gdb activated.