iOS Concurrency with GCD and Operations - Part 3: | Ray Wenderlich

hi @mennabah: for your second question, that was my mistake! we’ll fix it when we update this course. Thanks for spotting it!

For challenge 3, when I finish running the code and try to inspect the tiltShiftedImages after the sleep(5) using the playground quick look, Xcode just keeps crashing. Please what could be wrong with this?

I think there’s a bug in Xcode that’s fixed in the beta.