[Bug c++/124470] In C++ modules program, can't iterate with std::basic_string<char32_t>::const_iterator as no match for != operator

[sebj_coder3 at pm dot me]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124470

--- Comment #2 from Seb James <sebj_coder3 at pm dot me> ---
Ah, I had a problem with a tuple, too, which I hacked out and replaced with
std::pair to see if I could get my helloworld to compile. I couldn't find a
workaround to this one. Good to know it has probably been fixed in 16. I'm
hoping to be able to compile this project with at least one version of gcc, but
I have an error occurring with 16, too (124466 reported earlier today).