[Bug libstdc++/105915] [11 Regression] commit 42eff613 should be backported to gcc-11 for bits/fs_path.h consistency

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105915

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Benda Xu from comment #0)
> 2. https://github.com/gentoo/gentoo/pull/25313

N.B. I'm fixing it like this instead of backporting 42eff613d0, so that pull
request might want to use the same patch:

commit 60c84707034f025de3c8821cc5d6f27ff59143b0 (HEAD -> gcc-11)
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Fri Jun 10 13:01:16 2022 +0100

    libstdc++: Partially revert r11-9772-g6f8133689f4397 [PR105915]

    The r11-9772-g6f8133689f4397 backport made two changes, but only one was
    needed on the gcc-11 branch. The other should not have been backported,
    and causes errors with clang. This removes the unwanted part.

    libstdc++-v3/ChangeLog:

            PR libstdc++/105915
            * include/experimental/bits/fs_path.h (path::begin, path::end):
            Remove noexcept from declarations.

diff --git a/libstdc++-v3/include/experimental/bits/fs_path.h
b/libstdc++-v3/include/experimental/bits/fs_path.h
index 1cc1b3bf686..a2bc931c696 100644
--- a/libstdc++-v3/include/experimental/bits/fs_path.h
+++ b/libstdc++-v3/include/experimental/bits/fs_path.h
@@ -425,8 +425,8 @@ namespace __detail
     class iterator;
     typedef iterator const_iterator;

-    iterator begin() const noexcept;
-    iterator end() const noexcept;
+    iterator begin() const;
+    iterator end() const;

     /// @cond undocumented
     // Create a basic_string by reading until a null character.