syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // The caller should handle these cases!
context_before:         (ty::ConstKind::Infer(_), _) | (_, ty::ConstKind::Infer(_)) => {
context_after:             panic!("var types encountered in structurally_relate_consts: {:?} {:?}", a, b)