pub(crate) fn regexp_from_string(&mut self, string: &str) -> Result<RegexpInfo, RubyError> {
        RegexpInfo::from_string(&mut self.globals, string).map_err(VMError::regexp)
    }
Create fancy_regex::Regex from `string` without escaping meta characters.
Returns RubyError if `string` was invalid regular expression.
ruruby/src/vm/executor.rs