QProcess: Destroyed while process is still running.

bautistaeric

Hi,

Everytime I try to use a QProcess object I get the message: QProcess: Destroyed while process is still running.

I have tried two different ways:
@
QProcess *proc = new QProcess(this);
proc->start("executeScene.sh", QStringList() << "1" << "0.16");

QProcess proc2;
proc2.start("executeScene.sh", QStringList() << "1" << "0.16");
@
but the result is the same. Any suggestion?

dangelog

Are you deleting it before the started process has ended?

giesbert

Please show us a bit more of the sorounding code
I'm sure you delete it.

if you do the following, it's wrong:

@
foo()
{
QProcess proc2;
proc2.start("executeScene.sh", QStringList() << "1" << "0.16");
}
@

If you do it like this, it should work, but blocks the event loop (this code comes from the docs of "QProcess":http://doc.qt.nokia.com/latest/qprocess.html ):

@
foo()
{
QProcess gzip;
gzip.start("gzip", QStringList() << "-c");
if (!gzip.waitForStarted())
return false;

 gzip.write("Qt rocks!");
 gzip.closeWriteChannel();

 if (!gzip.waitForFinished())
     return false;

 QByteArray result = gzip.readAll();

}
@

florent.revelut

If you create the process variable on stack, it will be deleted when you go out of scope, unless you explicitely synchronize to wait until process is finished.

Just for testing, replace your QProcess by a QProcess*, most probably

you'll have a leak
the message will disappear