[Boost-bugs] [Boost C++ Libraries] #11627: small_vector<T, n>::swap( ) appears to be broken

Subject: [Boost-bugs] [Boost C++ Libraries] #11627: small_vector<T, n>::swap( ) appears to be broken
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-09-08 22:05:57

#11627: small_vector<T,n>::swap( ) appears to be broken
----------------------------------+------------------------
 Reporter:  benjamin.redelings@…  |      Owner:  igaztanaga
     Type:  Bugs                  |     Status:  new
Milestone:  To Be Determined      |  Component:  container
  Version:  Boost 1.59.0          |   Severity:  Problem
 Keywords:                        |
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 The small_vector class seems like it could be really useful!  However, it
 seems to have a broken implementation of the swap( ) member function.

 The first test case creates a small_vector<int,10> of size 2.  Swapping
 fails to clear the vector that is swapped from.

 bredelings_at_transposon:~/Devel/bali-phy/master$ g++ test.C -I
 boost/include/ -std=c++14
 bredelings_at_transposon:~/Devel/bali-phy/master$ ./a.out
 v.size() = 2   w.size() = 0
  swapping v and w ...
 v.size() = 2   w.size() = 2


 The second test case creates a small_vector<int,10> of size 11. Swapping
 seems to work, but apparently corrupts the heap:

 bredelings_at_transposon:~/Devel/bali-phy/master$ g++ test2.C -I
 boost/include/ -std=c++14
 bredelings_at_transposon:~/Devel/bali-phy/master$ ./a.out
 v.size() = 11   w.size() = 0
  swapping v and w ...
 v.size() = 0   w.size() = 11
 *** Error in `./a.out': munmap_chunk(): invalid pointer:
 0x00007ffd88feb978 ***
 Aborted

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11627>
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