[REG: 4.5.2->4.6]: Creating empty qmake project has invalid executable location in run settings

When creating an empty qmake project with the wizard, and adding minimal compilable application, building it succeeds but running gives an error:

Starting C:\qtprojects\build-untitled16-Desktop_Qt_5_10_1_MSVC2017_64bit-Debug\untitled16.exe...
Executable C:\qtprojects\build-untitled16-Desktop_Qt_5_10_1_MSVC2017_64bit-Debug\untitled16.exe does not exist.

This is a regression from 4.5.2 to 4.6.

In Projects -> <selected_kit> -> Run, the executable location is set as:

C:\qtprojects\build-untitled16-Desktop_Qt_5_10_1_MSVC2017_64bit-Debug\untitled16.exe

when the executable is in fact properly build to the "debug" sub directory:

C:\qtprojects\build-untitled16-Desktop_Qt_5_10_1_MSVC2017_64bit-Debug\debug\untitled16.exe

Creating other project templates do not seem to suffer from this same issue.