let span = label.ident.span.to(self.prev_token.span);
let mut err = self.struct_span_err(span, "block label not supported here");
err.span_label(span, "not supported here");
let span = label.ident.span.to(self.prev_token.span);
let mut err = self.struct_span_err(span, "block label not supported here");
err.span_label(span, "not supported here");