syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"ty::TermKind::Ty(ty)"}]}
source_snippet:             ty::TermKind::Ty(ty) => ty.is_ty_error(),
context_before:         match self.kind() {
context_after:             ty::TermKind::Const(ct) => ct.is_ct_error(),