Empty Command-Line Argument When Debugging

I recently upgraded from QtCreator 4.9.1 to QtCreator 4.10.0. When debugging the attached test code from within QtCreator 4.10.0, argc = 2 and argv[1] = "". But when simply running the program, argc = 1.

As a side-effect of the program receiving an empty argv argument, QCommandLineParser's positionalArguments method adds an empty string to the returned list.

The attached test code will write "arg: " to the console in a debug session, but write no output when run normally.