[Bug c/116728] c23 tag compatibility broken with pointers to incomplete types

[muecker at gwdg dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116728

--- Comment #4 from Martin Uecker <muecker at gwdg dot de> ---

Although the new example doesn't crash and the error I get seems correct to me.
What is the problem you see here?