https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: x11-terms/kitty-0.19.2 uses -Werror for build. Discovered on: amd64 (internal ref: ci) -Werror is not recommended for releases and should always be disabled when encountered in build-logs, because there are numerous cases where this breaks without purpose. See also: https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html NOTE: If you want to change the summary, to avoid auto-filed duplicates, please at least keep the word '-Werror'
There's been a patch to remove -Werror for the longest time, but it may have been wrong at one point triggering this. I'll just mark this obsolete given it isn't used right now (without a log and more digging, hard to say when this really got fixed).