compile_error
For the universal parser, `rb_parser_reg_fragment_check` function is shared between the parser and ripper. However `parser_params` struct is partially different, and `compile_error` function depends on that part indirectly.
include?
rb_fix_mul_fix
MUL_OVERFLOW_FIXNUM_P
Fiber::Scheduler#blocking_operation_wait
String#[]
String#slice
rb_ec_check_ints()