syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if !sub_ty.is_inhabited_from(self.cx.tcx, self.cx.module, self.cx.typing_env) {
context_before:         if let ty::Ref(_, sub_ty, _) = self.ty.kind() {
context_after:                 diag.note(fluent::mir_build_reference_note);