[Bug libstdc++/116802] Symbol `is` (non-standard) is user inside the library.

[tymi at tymi dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116802

--- Comment #7 from Tymi <tymi at tymi dot org> ---
"This issue is indeed invalid then" is not misleading. The issue is literally
invalid. `is` is a standard function.