Context leak detected, msgtracer returned -1

main.swift

//
//  main.swift
//  CGImageTest
//
//  Created by menangen on 09.10.2020.
//

import Foundation
import SpriteKit
import GameKit

func getTextureImage(_ index: Int, isSky: Bool = true) -> SKTexture {
    let colorTable = [
        NSColor(red: 0.0, green: 0.15, blue: 0.85, alpha: 1.0),
        NSColor(red: 1, green: 1, blue: 1, alpha: 1.0),
        
        NSColor(red: 0.5, green: 0.55, blue: 0.5, alpha: 1.0),
        NSColor(red: 0.8, green: 0.85, blue: 0.9, alpha: 1.0)
    ]
    
    let perlinSource = GKPerlinNoiseSource(
        frequency: 1,
        octaveCount: 7,
        persistence: 0.5,
        lacunarity: 2.0,
        seed: 123
    )
    
    let noise = GKNoise(perlinSource)
    
    noise.gradientColors = [
        -1.0: colorTable[isSky ? 0 : 2],
        1.0 : colorTable[isSky ? 1 : 3]
    ]
    
    noise.move(by: vector_double3(Double(index), 0, 0))
    
    let noiseMap = GKNoiseMap(noise,
                              size: SIMD2(repeating: 1),
                              origin: SIMD2(repeating: 0.0),
                              sampleCount: SIMD2(repeating: 16),
                              seamless: false)
    
    let t = SKTexture(noiseMap: noiseMap)
    let i = t.cgImage()
    
    return t
}


for y in 0...64 {
    for x in 0...64 {
        
        let t = getTextureImage(x)
    }
}