gravity-lang/test/unittest/03-semantic_step2/override_property.gravity

#unittest {
	name: "Test property overriden warning.";
	error: WARNING;
	error_row: 14;
	error_col: 2;
};

class class1 {
	var a;
	func f1() {return a;}
}

class class2:class1 {
	var a;
	func f1() {return a;}
}