Can't declare more than 7 QStrings ?!?!?!

[ruben.rodrigues]

Hi all!

I am struggling with a problem that I have never seen before. I need to declare 14 QStrings but I can only declare 7, because as soon as I declare 1 more my code crashes at the beginning.


*** glibc detected *** /home/itadmin/workspace/LDI_SPS/LDI_SPS: double free or corruption (out): 0x08d020c0 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb68a8704]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb68aa6b6]
/usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xb6a8a231]
/usr/lib/libQtCore.so.4(_ZN6QEventD0Ev+0x47)[0xb6c293d7]
/usr/lib/libQtCore.so.4(_ZN23QCoreApplicationPrivate16sendP ostedEventsEP7QObjectiP11QThreadData+0x2b7)[0xb6c256a7]
/usr/lib/libQtCore.so.4(_ZN16QCoreApplication16sendPostedEv entsEP7QObjecti+0x2d)[0xb6c2588d]
/usr/lib/libQtCore.so.4[0xb6c507ef]
/usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x1e8)[0xb668eb88]
/usr/lib/libglib-2.0.so.0[0xb66920eb]
/usr/lib/libglib-2.0.so.0(g_main_context_iteration+0x68)[0xb6692268]
/usr/lib/libQtCore.so.4(_ZN20QEventDispatcherGlib13processE ventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0 x58)[0xb6c50438]
/usr/lib/libQtGui.so.4[0xb6efe365]
/usr/lib/libQtCore.so.4(_ZN10QEventLoop13processEventsE6QFl agsINS_17ProcessEventsFlagEE+0x4a)[0xb6c2306a]
/usr/lib/libQtCore.so.4(_ZN10QEventLoop4execE6QFlagsINS_17P rocessEventsFlagEE+0xea)[0xb6c234aa]
/usr/lib/libQtCore.so.4(_ZN16QCoreApplication4execEv+0xb9)[0xb6c25959]
/usr/lib/libQtGui.so.4(_ZN12QApplication4execEv+0x27)[0xb6e5cd17]
/home/itadmin/workspace/LDI_SPS/LDI_SPS[0x80555e1]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5)[0xb684f775]
/home/itadmin/workspace/LDI_SPS/LDI_SPS[0x804bbb1]
======= Memory map: ========
08048000-08062000 r-xp 00000000 08:01 1843375 /home/itadmin/workspace/LDI_SPS/LDI_SPS
08062000-08063000 r--p 00019000 08:01 1843375 /home/itadmin/workspace/LDI_SPS/LDI_SPS
08063000-08064000 rw-p 0001a000 08:01 1843375 /home/itadmin/workspace/LDI_SPS/LDI_SPS
08b48000-08e49000 rw-p 08b48000 00:00 0 [heap]
b4400000-b4421000 rw-p b4400000 00:00 0
b4421000-b4500000 ---p b4421000 00:00 0
b45ed000-b46c8000 r-xp 00000000 08:01 7634980 /opt/indel/lib/libwx_basei-2.6.so.0.2.0
.....................

This is how the header file looks like:


/*
* ModuleTracer.h
*
* Created on: Jul 20, 2010
* Author: itadmin
*/

#ifndef MODULETRACER_H_
#define MODULETRACER_H_

#include "SPS/SPS_Indel_lib.h"
#include "Gui-Adds/modules_start.h"

#include <QThread>
#include <QtCore>


class ModuleTracer : public QThread {
Q_OBJECT
public:
ModuleTracer();
virtual ~ModuleTracer();
void run();


SPS_Indel_lib *indel_lib_Class;


QString module_LoadUnit_X_Axis_Value,
module_LoadUnit_Cyl_Axis_Value,
module_ChuckUnitPortal_Value,
module_ChuckUnitSupport_Value,
module_ChuckUnitVacuum_Value,
module_ToolUnitHexpod_Value,
module_ToolUnitVacuumInside_Value;
// module_ToolUnitVacuumOutside_Value;
// module_ImagingUnitHead1_Z_Axis_Value,
// module_ImagingUnitHead1_CAM_Value,
// module_ImagingUnitHead2_Z_Axis_Value,
// module_ImagingUnitHead2_CAM_Value,
// module_Utilities_Value,
// module_Airpressure_Value;

const char* _Target;

Modules_Start *Modules_Window;

};

#endif /* MODULETRACER_H_ */


As you can see some of my QStrings are commented because I can't run the program if they aren't.

If it helps I am using Eclipse Helios with qt 4.5.0 on ubuntu 9.04 32 bits.

Thanks

[alainstgt]

look at your delimiters in your string list... you have some ";" instead of ","

[ruben.rodrigues]

look at your delimiters in your string list... you have some ";" instead of ","

if that was the problem the program would not even run.
I just have some with ; and other with , because that's where I stop to test

[squidge]

Why are you subclassing QThread? Inherit QObject instead and create a normal QThread object.

[ruben.rodrigues]

I got it woking but I still don't know why I got the errors. It works with the class inherited from the QThread

[aamer4yu]

There is some memory corruption problem.
Check for instances where you are creating and deleting the objects of your class.

[ruben.rodrigues]

but now it works...I wish it didn't so I could see why. I have no idea why it works now

I also don't think it was a problem with a delete because I had none

[wysota]

You probably didn't recompile part of your project after adding strings and the size of your object changed enough to change relocation offsets of some method, hence the crash.

[ruben.rodrigues]

That seams possible to me