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List:       kde-core-devel
Subject:    Re: Crashes on closing applications
From:       Thomas =?iso-8859-15?q?L=FCbking?= <thomas.luebking () web ! de>
Date:       2010-07-11 14:14:56
Message-ID: 201007111614.57240.thomas.luebking () web ! de
[Download RAW message or body]

Am Sunday 11 July 2010 schrieb Rolf Eike Beer:
> I just wonder why this is libstdc++-v3, openSuSE 11.2 uses gcc 4.4 by
> default?
I don't think the libstdc++ version ever changed since gcc3 (and indeed, it's 
-v3 on gcc 4.5 as well)

The whole thing looks quite like a memory ("0x6" ...) corruption, but testing

gcc -O[n] std_string_seg.cpp -lstdc++ -o std_string_seg | n = 0-3

on the -plain std::string, no KDE- attachment doesn't fail at all
(i however don't know how -optimized- my libstdc++ was compiled)

So this is either in the particular OpenSuSE libstdc++ or an overflow in some 
KDE lib.

I also attached a binary, compiled and linked on arch, 32bit x86, gcc4.5 
prerelease, -O2, lisbstdc++.so.6.0.14 - maybe test it with gdb

Thomas

["std_string_seg.cpp" (text/x-c++src)]

#include <string>
#include <iostream>

int main()
{
    std::string *abc = 0;
    delete abc;
    abc = new std::string("test");
    std::cout << *abc; std::cout << '\n';
    *abc = "test1";
    std::cout << *abc; std::cout << '\n';
    *abc = '\0';
    std::cout << *abc;
    delete abc;
}


["std_string_seg" (application/x-executable)]

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