Cannot build Qt Test Application

1. Have MSVS2019 with installed Qt Visual Studio Tools.
   I used current VSTools from the marketplace.
2. Configure Qt 6.9.0 beta1 as used Qt version.
   I installed that using an installation's MaintenanceTool: C:\Qt\6.9.0\msvc2022_64
3. Create a new Qt Test Application (Qt/MSBuild) using the wizard.
4. Try building the app.
   Compilation fails:

   C:\Qt\6.9.0\msvc2022_64\include\QtCore\qtmochelpers.h(262,66): error C2065: 'result': undeclared identifier
   

When using MSVS2022, Qt 6.8.1 or a different project template, the build succeeds.

Found and tested by Squish test tst_new_project_file_creation.