[Bug libstdc++/107092] std::for_each_n and its friends incorrectly accept size parameters that are not convertible to an integer type

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107092

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://cplusplus.github.io/LWG/issue3213 is relevant, but we didn't address
the ambiguity question.