https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105915
Bug ID: 105915
Summary: commit 42eff613 should be backported to gcc-11 for
bits/fs_path.h consistency
Product: gcc
Version: 11.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: heroxbd at sohu dot com
Target Milestone: ---
Hi, comments 42eff613d0 is followed by 944da70a5d to add 'noexcept' to
path::iterator members. But in the gcc-11.3.0 release, only 944da70a5d was
applied.
With a MWE of
```c++
#include <experimental/filesystem>
int main(){}
```
would produce
```
/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.1/include/g++-v11/experimental/bits/fs_path.h:1209:9:
error: 'begin' is missing exception specification 'noexcept'
path::begin() const
^
/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.1/include/g++-v11/experimental/bits/fs_path.h:428:14:
note: previous declaration is here
iterator begin() const noexcept;
^
```
on a Gentoo system.
After applying 42eff613d0 to gcc-11.3.0, the bug disappears.
Please see also:
1. https://bugs.gentoo.org/842405
2. https://github.com/gentoo/gentoo/pull/25313
