“All paths through this function will call itself” on Protocol Equality Method

Using Swift
15

Using the extension does satisfy the warning, but now I can’t seem to use the method. In a test, I have this line:

XCTAssertTrue(edge == edge)

And this fails to compile with the error Binary operator '==' cannot be applied to two 'ViewEdgeConvertible' operands. This is what I have for ==:

extension ViewEdgeConvertible {

    public static func == (
        lhs: ViewEdgeConvertible,
        rhs: ViewEdgeConvertible
    ) -> Bool {
        return lhs.fixedViewEdge(using: nil) == rhs.fixedViewEdge(using: nil)
    }

}

Using the workaround from @Jumhyn, I can at least call == from a test. Very odd.