Suggestion: use shift-validator to avoid early errors

[bakkot]

I saw in the readme

Ability to generate code without any early errors.

The fact that shift-fuzzer doesn't do this already is a bug, but not one I'm likely to get around to fixing for a while yet. In the mean time, though, you can use shift-validator to confirm that the generated ASTs represent real programs. Its default export tells you if an AST is valid. If you generate an invalid one, you can just re-roll.

Depending on the setup this might be slower than just letting the consumer choke the invalid programs, but it's an option to consider.