https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114210
--- Comment #3 from Sirraide <rl.alt.accnt at gmail dot com> --- Ah, that makes sense: it’s basically treated like any other top-level cv-qualifier on a function parameter—it’s just that it happens to syntactically be in an unusual place compared to cv-qualifiers on regular function parameters. Thanks for clarifying this.