The oracle OCI SQl Plugin is unusable

The oracle OCI SQl Plugin is unusable. The first query results in an exception.

Exception thrown: read access violation.
{}d{} was 0xFFFFFFFFFFFFFF27.

The exception is thrown on delete d->cols; in line 1911 in qsql_oci.cpp function QOCIResult::internal_prepare.

The debugger shows 0xcdcdcdcdcdcdcdcd as value for d.

There is a new QOCIResultPrivate *d_ptr; in class QOCIResult, but that pointer is never initialized in the constructor.

Qt was built with:
..\Qt6.9\configure -debug -c+std c+20 -force-debug-info -prefix c:\Qt\6.9.0-debug -sql-oci -no-feature-accessibility -skip qtwebengine -skip qtpdf – -DOracle_LIBRARY=C:\ocisdk\oci.lib -DOracle_INCLUDE_DIR=C:\ocisdk\include
cmake --build . --parallel
cmake --install .

When following is inserted in the constructor
d_ptr = (QOCIResultPrivate*)QSqlCachedResult::d_ptr;
in the constructor, the simple example works. Seems the pimpl handling is messed up completly.

Problem was said to have started with
https://codereview.qt-project.org/c/qt/qtbase/+/553808
and this made it build
https://codereview.qt-project.org/c/qt/qtbase/+/571566