[Bug libstdc++/54388] [4.7/4.8 Regression] std::array.at() const results in undefined behaviour

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54388

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-09-09 
18:40:50 UTC ---
Author: redi
Date: Sun Sep  9 18:40:46 2012
New Revision: 191117

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191117
Log:
    PR libstdc++/54388
    * include/std/array (array::at() const): Ensure lvalue result.
    * testsuite/23_containers/array/element_access/54388.cc: New.

Added:
   
branches/gcc-4_7-branch/libstdc++-v3/testsuite/23_containers/array/element_access/54388.cc
Modified:
    branches/gcc-4_7-branch/libstdc++-v3/ChangeLog
    branches/gcc-4_7-branch/libstdc++-v3/include/std/array