syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"validate_mir:"}]}
source_snippet:     validate_mir: bool = (false, parse_bool, [UNTRACKED],
context_before:         "Generate sync unwind tables instead of async unwind tables (default: no)"),
context_after:         "validate MIR after each transformation"),