[libcxx-commits] [libcxx] [libc++][ranges] Fix `ranges::join_view` segmented iterator trait (PR #158347)

[via libcxx-commits]

lbonn wrote:

Not sure what is going on with the macos failures, I don't think they are touching these changes.

```
   Failed Tests (9):
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.match/awk.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.match/basic.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.match/ecma.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.match/extended.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.search/awk.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.search/basic.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.search/ecma.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.alg/re.alg.search/extended.locale.pass.cpp
    llvm-libc++-shared.cfg.in :: std/re/re.traits/lookup_collatename.pass.cpp
```

They already have some XFAIL on some other linux and freebsd targets.

https://github.com/llvm/llvm-project/pull/158347