"No executable file specified" at startup

[davidrohr]

When I try to start the debugger via the "Launch debugger" button, I get the error:
"No executable file specified."
"Use the file or exec-file command."
Apparently, it brings up gdb and issues the run command without setting the file before.
The program argument is set to the executable command correctly.

In contrast, using "attach debugger" and attaching to a running process works correctly.