[Bug libstdc++/106248] [11/12 Regression] operator>>std::basic_istream at boundary condition behave differently in different opt levels

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106248

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |12.1.0
            Summary|[11/12/13 Regression]       |[11/12 Regression]
                   |operator>>std::basic_istrea |operator>>std::basic_istrea
                   |m at boundary condition     |m at boundary condition
                   |behave differently in       |behave differently in
                   |different opt levels        |different opt levels

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk only so far.