[Bug c++/115798] [15 Regression][modules] ICE when re-exporting a type exported from base module's GMF

[m.cencora at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115798

--- Comment #1 from m.cencora at gmail dot com ---
Also this is specific to types exported from GMF, if type is declared directly
in named module it works fine, i.e.

$ cat base.cpp 
export module base;

export
{
    using int8_t = signed char;
}

export namespace std
{
    using int8_t = ::int8_t;
}