[Bug libstdc++/51823] reverse iterator instantiated with POD type returns uninitialized values + work around

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51823

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |NEW
   Last reconfirmed|                            |2012-01-11
         Resolution|INVALID                     |
     Ever Confirmed|0                           |1

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-01-11 14:17:34 UTC ---
actually, my bad, even if your type did meet the requirements it wouldn't work,
and that *is* a libstdc++ bug

at some point between C++03 and C++11 the definition of
reverse_iterator::operator* was changed to clarify this, making libstdc++'s
implementation wrong.  The standard now says:

[ Note: This operation must use an auxiliary member variable rather than a
temporary variable to avoid returning a reference that persists beyond the
lifetime of its associated iterator. (See 24.2.) —end note ]