contract A {
	function foo() external virtual view returns(uint) { return 5; }
}
contract B is A {
	function foo() external virtual override view returns(uint) { return 5; }
}
contract C is A {
	function foo() external virtual override view returns(uint) { return 5; }
}
contract X is B, C {
	uint public override foo;
}
// ----
// TypeError 4327: (305-313): Public state variable needs to specify overridden contracts "B" and "C".