wxWidgets and string & iostream

[Fibre Optic]

Teo Fonrouge wrote:
> 
> Yes, I used to have lots of cout's to make tracelogs. Now I use the
> wxWidgets wxLog* classes, are more powerfull & portable to do program
> tracelogs.
> 
> Have you tried to use a debug utility to do a trace ?.
> Is your cout iostream a valid one ? ( maybe a full or invalid device is
> causing the seg fault).
> 
> By the way :), what platform & libs versions are you using ?, could be
> useful to know your current environment settings.
> 
>> Regards,
>> Fibre Optic
>
> best regards 
> Teo Fonrouge

platform: win32 + mingw port of GCC
wxWidgets lib: i have compiled/linked the library from sources of CVS 
repository

the code is as follows:

#include <wx/wx.h>
#include <wx/regex.h>
#include <stdio.h>
#include <iostream>
#include <string>

int main(int argc, int arg[])
{
     char regex[255];
     wxString cookieField = 
wxT("Njky=gg6435345b at APC216@172.16.1.15 at D34fD$F$F$F");

     std::cout << "cookieField: " << cookieField.mb_str() << std::endl;

     wxString userID;
     char *p;

     printf("Enter cookie RegEx and press enter: ");
     fgets(regex, sizeof(regex), stdin);

     //now remove \n
     if ((p = strchr(regex, '\n')) != NULL);
     *p = '\0';

     wxRegEx cookieRegEx(wxT(regex));

     if (cookieRegEx.Matches(cookieField)) {
      userID = cookieRegEx.GetMatch(cookieField, 1);
      printf("User ID: %s\n", userID.c_str());
     }
}

and here is stack trace:

wxRegEx-Test.exe caused an Access Violation at location 7c918fea in 
module ntdll.dll Writing to location 00000010.

Registers:
eax=00000000 ebx=00000000 ecx=00000000 edx=73dae7b0 esi=73dae7b0 
edi=00000000
eip=7c918fea esp=0023fc1c ebp=0023fc90 iopl=0         nv up ei pl nz na 
pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000 
efl=00000202

Call stack:
7C918FEA  ntdll.dll:7C918FEA  RtlpWaitForCriticalSection
7C90104B  ntdll.dll:7C90104B  RtlEnterCriticalSection
77C40E8B  msvcrt.dll:77C40E8B  fputc
005BB47F  wxRegEx-Test.exe:005BB47F  _GLOBAL__D_main  wxRegEx-Test.cpp:32
	...
	}
	
	...

005D4F8C  wxRegEx-Test.exe:005D4F8C  _GLOBAL__D_main  wxRegEx-Test.cpp:32
	...
	}
	
	...

005E60F2  wxRegEx-Test.exe:005E60F2  _GLOBAL__D_main  wxRegEx-Test.cpp:32
	...
	}
	
	...

004013BA  wxRegEx-Test.exe:004013BA  main  wxRegEx-Test.cpp:17
	...
	    char *p;
	
 >	    printf("Enter cookie RegEx and press enter: ");
	    fgets(regex, sizeof(regex), stdin);
	
	...

00401237  wxRegEx-Test.exe:00401237
00401288  wxRegEx-Test.exe:00401288
7C816FD7  kernel32.dll:7C816FD7  RegisterWaitForInputIdle


If I have overlooked something let me know.

Regards,
Fibre Optic