https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110861
--- Comment #1 from Christopher Head <headch at gmail dot com> --- Note that I ran into this while trying to find a small repro case for the same symptoms (uninitialized “this” and segfault using a string_view) in a larger project, where I originally saw the same thing happen while only importing stdlib headers, not including any of them, and eventually made this as a smaller example.