For the universal parser, rb_reg_named_capture_assign_iter_impl
function is shared between the parser and ripper. However parser_params struct is partially different, and assignable
function depends on that part indirectly.
Related issues
Bug #20969: Segmentation fault with `Ripper.lex '/(?<_1>)/=~s'`
Added by
[Bug #20969] Pass
assignablefrom ripperFor the universal parser,
rb_reg_named_capture_assign_iter_implfunction is shared between the parser and ripper. However
parser_paramsstruct is partially different, andassignablefunction depends on that part indirectly.