https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113674
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- [[____maybe_unused____]] int g (int i) { return i; } crashes in cc1plus since r8-2418-g577eec56569258 which is probably the real culprit: commit 577eec5656925889d99c658de2a54ba8bd3ebf79 Author: Martin Liska <mli...@suse.cz> Date: Mon Aug 7 10:37:07 2017 +0200 Canonicalize names of attributes.