Po Lu <luangruo@yahoo.com> writes:

> What I suspect is that there is some CU in which `struct
> selection_input_event' is incomplete or fails to appear in `union
> buffered_input_event' and that that misleads the compiler during
> link-time recompilation.  But I could be far off the mark, since I am
> very much out of touch with contemporary GCC.

After devoting another 30 minutes to this problem, I've reduced it to a
trivial test case that reveals the same miscompilation under GCC 14.2.1: