[Bug libstdc++/109299] [12/13 Regression] wrong warning on std::wstring with -O2 -std=c++20 -D_FORTIFY_SOURCE=2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109299

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
      Known to fail|                            |12.2.0, 13.0
   Target Milestone|---                         |12.3
           Priority|P3                          |P2
   Last reconfirmed|                            |2023-03-28
      Known to work|                            |11.3.0
            Version|12.1.0                      |12.2.0
            Summary|wrong warning on            |[12/13 Regression] wrong
                   |std::wstring with -O2       |warning on std::wstring
                   |-std=c++20                  |with -O2 -std=c++20
                   |-D_FORTIFY_SOURCE=2         |-D_FORTIFY_SOURCE=2
          Component|tree-optimization           |libstdc++
             Status|UNCONFIRMED                 |NEW

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed for the unreduced testcase.  Works for GCC 11.