linux/drivers/of/unittest-data/overlay_bad_symbol.dts

/dts-v1/;
/plugin/;

/ {

	fragment@0 {
		target = <&electric_1>;

		__overlay__ {

			// This label should cause an error when the overlay
			// is applied.  There is already a symbol hvac_1
			// in the base tree
			hvac_1: hvac-medium-2 {
				compatible = "ot,hvac-medium";
				heat-range = < 50 75 >;
				cool-range = < 60 80 >;
			};

		};
	};
};