syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"TyKind::Infer(_)"}]}
source_snippet:             TyKind::Infer(_) => bug!("upvar_tys called before capture types are inferred"),
context_before:             TyKind::Tuple(..) => self.tupled_upvars_ty().tuple_fields(),
context_after:             ty => bug!("Unexpected representation of upvar types tuple {:?}", ty),