syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"},"}]}
source_snippet:                         },
context_before:                             None => dcx.emit_fatal(LoopMatchMissingAssignment { span: body.span }),
context_after:                         [single] if body.expr.is_none() => match single.kind {