segv error in signal

[Sheng]

have u tested this on different platforms?

No, it can only be tested on the target device, which run linux debian.

Can you post the stack trace?

When I use gdb to run the application, I never see segv error.

Is the function a virtual function? Virtual function does not work in constructor coz there is no v-table yet...

Also make sure all initialization has been completed because the object is still "under construction"...

Since most of the time the application works fine, I think it's not the constructor issue. The function itself is not virtual.

maybe you pass invalid pointer in QObject::connect?
could you show us compilable code?

As I said, it works in most of times, so I think it can not happen that I pass invalid pointer.

To solve this, I initialize the dialog object out of QWindow1, then it seems work fine. Any thought? thanks