Lost line with QProcess

[starrl]

I am having problems with the following short program I wrote with Qt 4.1.2

#include <QString>
#include <iostream>
#include <QProcess>
 
using namespace std;
 
void ProcessLine( QString );
 
int main()
{
    QProcess *gzip = new QProcess;
    QString line;
    gzip->start("gunzip in.txt.gz -c");
 
    while (gzip->waitForReadyRead()) {
       while (gzip->canReadLine()) {
            line = gzip->readLine();
           ProcessLine( line );
       }
    }
}
 
void ProcessLine( QString line ) {
   cout << line.toStdString();
}

#include <QString>
#include <iostream>
#include <QProcess>

using namespace std;

void ProcessLine( QString );

int main()
{
    QProcess *gzip = new QProcess;
    QString line;
    gzip->start("gunzip in.txt.gz -c");

    while (gzip->waitForReadyRead()) {
       while (gzip->canReadLine()) {
            line = gzip->readLine();
           ProcessLine( line );
       }
    }
}

void ProcessLine( QString line ) {
   cout << line.toStdString();
}

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my test file in.txt.gz contains the following all zipped
this is a test 1
this is a test 2
this is a test 3
this is a test 4
this is a test 5
this is a test 6
this is a test 7
this is a test 8

when I compile and run my code I get the following output.
this is a test 2
this is a test 3
this is a test 4
this is a test 5
this is a test 6
this is a test 7
this is a test 8

Notice that I have somehow lost the first line of the file.
every once in a while I do end up getting the first line.

Can someone Please tell me what's happing to the first line?
What is wrong with my code?