Use `catch_unwind`, like [here](https://github.com/uvlad7/xml2json-rb/blob/0e794a5e5b12632a6a3c69b96147cf5955ff80e0/ext/xml2json/jagnus/src/jni_function.rs#L81), call `fatal_error` [then](https://github.com/uvlad7/xml2json-rb/blob/0e794a5e5b12632a6a3c69b96147cf5955ff80e0/ext/xml2json/jagnus/src/lib.rs#L36).
Use
catch_unwind, like here, callfatal_errorthen.