SIGSEGV on launch develop version

[Fusion86]

Describe the bug
The latest develop release throws a SIGSEGV when starting Degate.

To Reproduce
Steps to reproduce the behavior:

1. Build degate with Qt 6.5.2 GCC 64bit
2. Launch the newly built executable in build/out/bin
3. Critical error message.

Build ABI: 'x86_64-little_endian-lp64'
Kernel type: 'linux'
kernel version: '5.4.0-159-generic'
Current CPU architecture: 'x86_64'
Build CPU architecture: 'x86_64'
Product type: 'ubuntu'
Pretty product name: 'Ubuntu 20.04.6 LTS'
Product version: '20.04'
Degate version: '2.1.0-alpha.1'
Degate version type: 'nightly'
Degate release date: 'unreleased'
An unexpected error occurred. Error message:

'A SIGSEGV occurred (11).'

Possible fix
In MainWindow.cc the call QGuiApplication::screenAt(this->pos()) returns a nullptr on my machine. Not sure why, but it does. If I comment out that line (or add nullptr checks) the application starts just fine.
Possible fix -> Fusion86@0017bcb

Just reporting this here for completeness sake. I fixed my own issue, so feel free to close this if this doesn't belong here.

[DorianBDev]

Hello, thanks for the bug report (and identifying the source). This seems to be related to #19 (Qt6 migration), something may have changed in Qt6. I will merge a fix in the next few minutes

[DorianBDev]

@Fusion86 This should be fixed now with 3dc2861, can you confirm? Also thank you for other contributions related to deprecation warnings

[Fusion86]

Yes, this fixes the issue for me. Thanks!