Omitting startrule doesn't fallback to first parser rule (when debugging)

[ronnieoverby]

As the title says, I must supply a start rule in launch.json or else I get an error stating that undefined rule can't be found.

Your docs state that the first parser rule will be used in the absence of a specified start rule.

[ronnieoverby]

Let me know if you need anything from me to reproduce this. As a workaround, I've set the start rule to "debug" and just have a debug rule in my grammar that aliases the rule that I want to test.