https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106609
--- Comment #15 from Sébastien Michelland <sebastien.michell...@ens-lyon.fr> --- Thanks, turns out my bisected commit was related after all... I can confirm that test cases from OP and #4 (with protocol from OP) are no longer broken for me on yesterday's master.