[Bug libstdc++/52822] [C++11] stable_partition destroys sequence due to inappropriate self-move-assignment

["jyasskin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52822

--- Comment #11 from Jeffrey Yasskin <jyasskin at gcc dot gnu.org> 2012-04-12 22:26:08 UTC ---
Author: jyasskin
Date: Thu Apr 12 22:26:02 2012
New Revision: 186396

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186396
Log:
Fix PR52822 by explicitly checking for object identity before
move-assigning.  This is a simpler fix than was committed to 4.7 and
4.8.

2012-04-12   Jeffrey Yasskin  <jyasskin@google.com>

    PR libstdc++/52822
    * include/bits/stl_algo.h (__stable_partition_adaptive): Avoid
    move-assigning an object to itself by explicitly testing for
    identity.
    * testsuite/25_algorithms/stable_partition/pr52822.cc: Test
    vectors, which have a destructive self-move-assignment.
    * testsuite/25_algorithms/stable_partition/moveable.cc (test02):
    Test with rvalstruct, which explicitly checks
    self-move-assignment.

Added:
   
branches/gcc-4_6-branch/libstdc++-v3/testsuite/25_algorithms/stable_partition/pr52822.cc
Modified:
    branches/gcc-4_6-branch/libstdc++-v3/ChangeLog
    branches/gcc-4_6-branch/libstdc++-v3/include/bits/stl_algo.h
   
branches/gcc-4_6-branch/libstdc++-v3/testsuite/25_algorithms/stable_partition/moveable.cc