[Bug c++/118817] [14/15 Regression] stringop-overflow and array-bound error with LTO/O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118817

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
      Known to fail|                            |14.2.1, 15.0
   Target Milestone|---                         |14.3
     Ever confirmed|0                           |1
      Known to work|                            |13.3.0
           Priority|P3                          |P2
             Status|UNCONFIRMED                 |NEW
            Summary|stringop-overflow and       |[14/15 Regression]
                   |array-bound error with      |stringop-overflow and
                   |LTO/O3                      |array-bound error with
                   |                            |LTO/O3

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

-O3 -fPIC -flto -Wall -std=c++20 -shared

is the relevant set of options to trigger this.  IIRC this was triggered by
standard library changes, there might be a bug reported for the underlying
issue already.