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Created attachment 1912951 [details]
test source file

Description of problem: When

Version-Release number of selected component (if applicable):
gcc-toolset-11-11.1-1.el8.x86_64

How reproducible: 100%

Steps to Reproduce:
1. Install gcc-toolset-11 package.
2. Run compilation with test file: "scl enable gcc-toolset-11 'g++ -o char_test char_test.cpp"
3. Run the char_test binary.

Actual results:
UTF-8
UTF-32LE
Dir1/猫.txt
Build from char multibyte string
Build from wchar_t string
terminate called after throwing an instance of 'std::filesystem::__cxx11::filesystem_error'
  what():  filesystem error: Cannot convert character sequence: Invalid or incomplete multibyte or wide character
Aborted (core dumped)

Expected results:
UTF-8
UTF-32LE
Dir1/猫.txt
Build from char multibyte string
Build from wchar_t string

Additional info:
- This was illustrated in upstream GCC bug 95048.

The upstream PR hasn't been fixed yet, so there's nothing to backport at this time.  Let's track this upstream
in https://gcc.gnu.org/PR95048.

The upstream bug hasn't been fixed yet.

There's now a patch: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/603871.html

The patch hasn't been reviewed yet but there's a chance we could fix this in GTS 12.1.

Patch backported to upstream gcc 12.

(In reply to Marek Polacek from comment #8)
> Patch backported to upstream gcc 12.

https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=c6bd8fac5e3bc6003f889fbd6042c0d8aa9c40ed

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (gcc-toolset-12-gcc bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2766