[Bug libstdc++/69383] [6 Regression] r232586 breaks Firefox build

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69383

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2016-01-20
     Ever confirmed|0                           |1

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please provide preprocessed source so I can see what silliness Firefox does
this time, but basically this is undefined behaviour:

In file included from ../../../dist/system_wrappers/stdlib.h:3:0,
                 from ../../../dist/include/mozilla/mozalloc.h:15,
                 from ../../../dist/stl_wrappers/cstdlib:39,

I'm not going to hold off fixing bugs in the real standard library because of
projects that have their own fake standard library with undefined behaviour.