[Bug libstdc++/79162] [7 Regression] [C++17] ambiguity in string assignment due to string_view overload

[ryxi at stu dot xidian.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79162

--- Comment #2 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
> Seems similar to LWG 2758.

http://cplusplus.github.io/LWG/lwg-defects.html#2758