Crash when loading project with run config with custom executable

What I planned to do:
Configure Qt Creator to run a custom application that has the current project's application as parameter, such as startaut --cwd /blah /blah/bin/binary. I did that by adding a run configuration with a custom executable. The exact variables I used are these:

--cwd=%{buildDir} %{CurrentRun:Executable:FilePath}

Then, when trying to run that configuration, Qt Creator crashed. The run config was not yet saved at that point. If I make QtC save the config first, it also crashes when loading the project. I attached backtraces from both crashes.

• Removing the run configuration from the project's .pro.user file makes it load correctly again.
• I can reproduce the crash with the existing project in a fresh session.
• When using a different variable (such as DebuggedExecutable:FilePath) the crash doesn't occur.

A project with the crashing run config is attached. The application is an empty Qt console program.