syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if tcx.features().never_type_fallback() { tcx.types.never } else { tcx.types.unit }
context_before:     pub fn new_diverging_default(tcx: TyCtxt<'tcx>) -> Ty<'tcx> {
context_after:     }