[Bug fortran/121743] [15/16 regression] ICE in build_function_decl, at gcc/fortran/trans-decl.cc:2519 since r15-6414-g91d52f87c5bc48

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121743

--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
The one liner in Comment #2 does fix this and regression tests on x86_64.

I will prepare the commit with Jakub's test case in Comment #4.

I can then backport to 15 if all is well.