[Bug c/120381] [14/15/16 Regression] internal compiler error: in composite_type_internal, at c/c-typeck.cc:848

[jsm28 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120381

--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Nesting one definition of struct A inside another is never valid (and the
godbolt link shows the expected "nested redefinition" error that the PR doesn't
quote).