Tried to overrelease a framebuffer, did you forget to call -useNextFrameForImageCapture before using -imageFromCurrentFramebuffer?'

[dashugege]

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Tried to overrelease a framebuffer, did you forget to call -useNextFrameForImageCapture before using -imageFromCurrentFramebuffer?'

the code 👍

class func CameraGPUlookupFennenFilter() -> GPUImageFilterGroup {
let group = GPUImageFilterGroup()
let image = UIImage(named: "lookupFennen")
let lookupImageSource = GPUImagePicture.init(image: image)
let lookupFilter = GPUImageLookupFilter.init()
group.addTarget(lookupFilter)

    lookupImageSource?.addTarget(lookupFilter, atTextureLocation: 1)
    lookupImageSource?.processImage()
    group.initialFilters = [lookupFilter]
    group.terminalFilter = lookupFilter

    return group
}

the code error ?why

[dhoerl]

Why aren't you using guard with this line: "let lookupImageSource = GPUImagePicture.init(image: image)"?