Use hypothesis to find bugs in the lilypond parser?

[jgarte]

@trevorbaca @josiah-wolf-oberholtzer

What do you think of using hypothesis to test and find bugs in the lilypond parser?

I think that it might help find bugs similar to this one:

#1471

[josiah-wolf-oberholtzer]

@jgarte Recommend trying it out yourself and reporting back if you find something concretely useful.