[Bug c/59304] #pragma diagnostic pop after warning fails for options unspecified in the command-line and disabled by default

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59304

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|#pragma diagnostic pop      |#pragma diagnostic pop
                   |fails with -Wswitch-enum    |after warning fails for
                   |                            |options unspecified in the
                   |                            |command-line and disabled
                   |                            |by default

--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
We could undo back to the command-line just reseting variables mentioned in the
classification history up to the POP. But this might be fragile (the pragma
diagnostics warning uses handle_generated_option, which does a lot of extra
work) and also it does not work with variables that enable other variables
like: "-Wall".