SCNView doesn't free added gesture recognizers after deinit

Originator:nazarof.anton
Number:rdar://6164844138987523 Date Originated:9 July, 2019
Status: Resolved:
Product:SceneKit Product Version:12.0
Classification:Bug Reproducible:Yes
 
CNView doesn't free added gesture recognizers after deinit. Please check out provided test case.

var wasDeallocated = false
class MyGestureRecognizer: UIGestureRecognizer {
    deinit { wasDeallocated = true }
}

class Foo {
    let scnView = SCNView() // test passes if change to `UIView()`

    init() {
        scnView.addGestureRecognizer(MyGestureRecognizer(target: self, action: #selector(test)))
    }

    @objc func test() { }
}

final class Test: XCTestCase {
    func testMemoryLeak() {
        autoreleasepool {
            _ = Foo()
        }
        XCTAssertTrue(wasDeallocated)
    }
}

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