baby nautilus fuzzer
(Nautilus)[https://www.ndss-symposium.org/ndss-paper/nautilus-fishing-for-deep-bugs-with-grammars/] is a coverage-guided and grammar-based fuzzer. It needs to read the mruby's context-free grammar stored in grammar.json. And then use the corresponding feedback, generator, and mutator to fuzz.
libafl::mutators::nautilus contains:
NautilusInput,NautilusContext
NautilusChunksMetadata,NautilusFeedback
NautilusGenerator
NautilusRandomMutator,NautilusRecursionMutator,NautilusSpliceMutator