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From "Stefan Teleman (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (STDCXX-1060) std::basic_string::append(char*, pos) SIGSEGV for pos == std::string::npos
Date Mon, 06 Feb 2012 03:14:03 GMT
std::basic_string::append(char*, pos) SIGSEGV for pos == std::string::npos
--------------------------------------------------------------------------

                 Key: STDCXX-1060
                 URL: https://issues.apache.org/jira/browse/STDCXX-1060
             Project: C++ Standard Library
          Issue Type: Bug
          Components: 21. Strings
    Affects Versions: 4.2.1, 4.2.x, 4.3.x, 5.0.0
         Environment: Solaris 10 and 11
Red Hat Linux, OpenSuSE Linux
Sun C++ Compiler 12.1, 12.2, 12.3

Defect is independent of platform/compiler
            Reporter: Stefan Teleman
             Fix For: 4.2.2, 4.2.x, 4.3.x, 5.0.0
         Attachments: test.cc

std::basic_string::append(char*, pos) SIGSEGV for pos == std::string::npos:

{code:title=test.cc|borderStyle=solid}
#include <iostream>
#include <string>
#include <stdexcept>

int main()
{
    const char* c = "hello";
    std::string s(5, '*');
    std::string t;
    int ret;

    try
    {
        t = s.append(c, std::string::npos);
    }
    catch (std::length_error& e)
    {
        ret = 0;
    }
    catch ( ... )
    {
        std::cerr << "wrong exception was thrown!" << std::endl;
        ret = 1;
    }

    std::cerr << "t: " << t.c_str() << std::endl;
    std::cerr << "s: " << s.c_str() << std::endl;

    return ret;
}
{code}

1. Output from GCC 4.5.0:
{noformat}
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
21:56:30][2023]>> ./test-gcc 
t: 
s: *****
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:04:45][2024]>> echo $status
0
{noformat}

2. Output from Sun C++ 12.2 with stlport:
{noformat}
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:04:47][2025]>> ./test-ss122-stlport 
t: 
s: *****
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:04:53][2026]>> echo $status
0
{noformat}

3. Output from Sun C++ 12.2 with our patched stdcxx:
{noformat}
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:04:55][2027]>> ./test-ss122-stdcxx 
t: 
s: *****
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:05:00][2028]>> echo $status
0
{noformat}

4. Output from Pathscale 4.0.12.1 (which did not patch stdcxx):
{noformat}
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:05:02][2029]>> ./test-pathscale 
Segmentation fault (core dumped)
[steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/6889785][02/05/2012
22:05:08][2030]>> echo $status
139
{noformat}

Defect is in file include/string, line 874.

Patch for stdcxx 4.2.1 to follow shortly.


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