[Octave-bug-tracker] [bug #36161] segfault when using octave_map with g++ --std=c++11

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?36161>

                 Summary: segfault when using octave_map with g++ --std=c++11
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Fri 13 Apr 2012 08:01:32 AM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: fas
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

A segfault occurs when the following code is compiled with c++11 support.
Without c++11 support, there is no problem.


Using g++ (GCC) 4.7.0 20120407 on Archlinux 64 bit.

Short code to reproduce: 

#include <octave/oct.h>
#include <octave/oct-map.h>
 
int main() {
  Octave_map map;
}


Compile and run with:

$ g++ --std=c++0x test.cpp -o test -I/usr/include/octave-3.6.1
-L/usr/lib/octave/3.6.1/ -loctave -loctinterp 
$ LD_LIBRARY_PATH=/usr/lib/octave/3.6.1/ ./test

Valgrind output:

==22564== Use of uninitialised value of size 8
==22564==    at 0x401E74: dim_vector::~dim_vector() (dim-vector.h:257)
==22564==    by 0x402246: Octave_map::~Octave_map() (in
/home/marko/test/test)
==22564==    by 0x401A7A: main (test.cpp:5)
==22564== 
-402653184
==22564== Use of uninitialised value of size 8
==22564==    at 0x401E9B: dim_vector::~dim_vector() (dim-vector.h:258)
==22564==    by 0x402246: Octave_map::~Octave_map() (in
/home/marko/test/test)
==22564==    by 0x401A7A: main (test.cpp:5)
==22564== 
==22564== 
==22564== Process terminating with default action of signal 11 (SIGSEGV)
==22564==  Bad permissions for mapped region at address 0x401B2C
==22564==    at 0x401EA0: dim_vector::~dim_vector() (dim-vector.h:258)
==22564==    by 0x402246: Octave_map::~Octave_map() (in
/home/marko/test/test)
==22564==    by 0x401A7A: main (test.cpp:5)
==22564== 
==22564== HEAP SUMMARY:
==22564==     in use at exit: 424,342 bytes in 3,613 blocks
==22564==   total heap usage: 5,435 allocs, 1,822 frees, 528,542 bytes
allocated
==22564== 
==22564== LEAK SUMMARY:
==22564==    definitely lost: 0 bytes in 0 blocks
==22564==    indirectly lost: 0 bytes in 0 blocks
==22564==      possibly lost: 289,624 bytes in 1,375 blocks
==22564==    still reachable: 134,718 bytes in 2,238 blocks
==22564==         suppressed: 0 bytes in 0 blocks
==22564== Rerun with --leak-check=full to see details of leaked memory
==22564== 
==22564== For counts of detected and suppressed errors, rerun with: -v
==22564== Use --track-origins=yes to see where uninitialised values come from
==22564== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 3 from 3)




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File Attachments:


-------------------------------------------------------
Date: Fri 13 Apr 2012 08:01:32 AM UTC  Name: test.cpp  Size: 313B   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=25636>

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