[solved] SIGSEGV segmentation fault

[asma11]

login.h:
@#ifndef LOGIN_H
#define LOGIN_H

#include <QMainWindow>
#include<QtSql>
#include<QDebug>
#include<QFileInfo>
#include<QDialog>
#include"client.h"
#include"inscription.h"

namespace Ui {
class login;
}

class login : public QMainWindow
{
Q_OBJECT

public:
explicit login(QWidget *parent = 0);
~login();
QSqlDatabase mydb;
bool connOpen()
{
mydb = QSqlDatabase::addDatabase("QSQLITE");
mydb.setDatabaseName("C:/sqlite/users.sqlite");
if(!mydb.open())
{
qDebug()<<"failed to open the database";
return false;
}
else
{
qDebug()<<"Connected...";
return true;
}
}
void connClose()
{
mydb.close();
mydb.removeDatabase(QSqlDatabase::defaultConnection);
}

private slots:
void on_pushButton_clicked();

void on_pushButton_2_clicked();

private:
Ui::login *ui;
};

#endif // LOGIN_H
@

[asma11]

login.cpp:
@#include "login.h"
#include "ui_login.h"

login::login(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::login)
{
ui->setupUi(this);
QPixmap pic("C:/Users/asma/Desktop/mychat/client/login.png");
ui->label_4->setPixmap(pic);

if(!connOpen())
    ui->label_3->setText("failed to open database");
else
    ui->label_3->setText("Connected");

}

login::~login()
{
delete ui;
}

void login::on_pushButton_clicked()
{
QString username, password;
username = ui->lineEdit_username->text();
password = ui->lineEdit_password->text();

if(!connOpen())
{
    qDebug()<<"failed to open database";
    return;
}
connOpen();
QSqlQuery qry;
//qry.prepare("select * from users where pseudo = '"+username+"' and mot_de_passe = '"+password+"'");
qry.prepare("select * from users where pseudo = :username and mot_de_passe = :password");
            qry.bindValue(":username",username);
            qry.bindValue(":password",password);
if (qry.exec&#40;&#41;)
{
    int count=0;
    while(qry.next())
    {
        count++;
    }
    if(count==1)
    {
        ui->label_3->setText("username and password are correct");
        connClose();
        this->hide();
        client c;
        c.setModal(true);
        c.exec&#40;&#41;;
    }
    if(count<1)
    {
        ui->label_3->setText("username and password incorrect , veuillez s'inscrir");
        connClose();
        this->hide();
        inscription Inscription;
        Inscription.setModal(true);
        Inscription.exec&#40;&#41;;
    }

}
else qDebug()<< qry.lastError();

}

void login::on_pushButton_2_clicked()
{
this->hide();
inscription Inscription;
Inscription.setModal(true);
Inscription.exec();
}
@

[KushalAusula]

Hi,
As far as I know this error could be caused due to accessing a NULL POINTER of invalid memory.

[KushalAusula]

Hi,
As far as I know this error could be caused due to accessing a NULL POINTER or invalid memory.

[Ildar]

What are type of listeMessages object? And are you initialize listeMessages?

[asma11]

Hi , listeMessages is a QTextBrowser

[asma11]

i have changed s.th and now the debugger shows me that the ploblem is on line 33 :
socket->connectToHost(serveurIP->text(), serveurPort->value());

[SGaist]

Hi,

From the code you posted, neither serveurIP nor serveurPort are initialized

[asma11]

serveurIP is a QLineEdit ,serveurPort is a QDableSpinBox : both are inisialised in client.ui

[SGaist]

Then, the calls should be

@socket->connectToHost(ui->serveurIP->text(), ui->serveurPort->value());@

[asma11]

it's ok i have solved this problem but now another error appaired it's related with socket i will create another discussion . Thanx everybody for help :)

[SGaist]

So what was the problem ?

Since you solved it, please update the thread title prepending [solved] so other forum users may know a solution has been found :)

[asma11]

Hi ,the problem was on: "socket->connectToHost(ui->serveurIP->text(), ui->serveurPort->value()); " on this line I forget to put ui-> as you told me @SGaist , thanx for help.

[SGaist]

What is strange is that this would compile, so I guess you have member variables with these names in your class ? If so remove you should remove them