[Bug libstdc++/105284] missing syncstream and spanstream forward decl. in <iosfwd>

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105284

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
   Target Milestone|12.2                        |11.4
         Resolution|---                         |FIXED

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 11.4 and 12.2, thanks for the report.