syntax_data: {"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let ty::Adt(def, args) = ty.kind() else {
context_before:             try_visit!(visitor.visit(span, ty));
context_after:                 span_bug!(span, "invalid type for {kind:?}: {:#?}", ty.kind())