[Qt-interest] why does emit() crash

[Atlant Schmidt]

Oluwafemi:

> is there something about emit calls that's hidden?

  Yes, in a sense. In an ordinary single-process, single-threaded Qt application,
  emit() should just become calls to each of the slot routines that you "connect()ed"
  to the signal that you emit.

  Perhaps one or more of the objects with the connected slot methods are no
  longer in existence so the attempt to call their slot method(s) fail?

  In any case, it should be easy to use a debugger to step through the
  emit into the various connected slot routines.

                                 Atlant

________________________________
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Oluwafemi Ade
Sent: Monday, July 19, 2010 8:33 AM
To: qt-interest at trolltech.com
Subject: [Qt-interest] why does emit() crash

Hi everyone, I' m developing an application that recives some data over the network and in the receiving module/class a readData() func. uses a switch stmt to determine what to do, in a particular branch I combined the values of several cases and had the module emit a signal................which triggers a slot that also contains  a switch stmt to know what to do. I found out that every case in the module/class that emits the signal crashes the program on the emit call, that just one particular case does not, if the emit signal is commented out, the program does not crash, I even tried to re-structure the readData() function and separate the cases into distinct branches, but only that same one survives without crashing the program...............is there something about emit calls that's hidden? help will be appreciated


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