Fix null pointer access in Ripper#initialize #8085
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In `rb_ruby_ripper_parser_allocate`, `r->p` is NULL between creating `self` and `parser_params` assignment. As GC can happen there, the typed-data functions for it need to consider the case.
This was referenced Jul 16, 2023
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In
rb_ruby_ripper_parser_allocate,r->pis NULL between creatingselfandparser_paramsassignment. As GC can happen there, the typed-data functions for it need to consider the case.