syntax_data: {"ast_node_type":"other","tokens":[{"end":12,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:     } else {
context_before:         decl.inputs.iter().map(|ty| ty.span).chain(iter::once(decl.output.span()))
context_after:         bug!("unexpected item for fn {def_id:?}: {node:?}")