Segfault on startup when enabling memory debugging on win64 mingw qt 6.8

[gamecreature]

Qt 6.8 via mingw gives a segfault in QXmlReader when memory debugging is enabled.

Debugging:
The QXmlStreamReader constructor initializer passes a nullptr as this to the QXmlStreamReader_private.
This is definitely a custom new/delete issue in the override EDBEE_DEBUG_NEW macros. Disabling makes the application run.