I just realized that it only happened when I am using second monitor
annomusa
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I got the same error too with these spec
Xcode 12.5 beta 3
Mac os 11.2.3
Xcode, Terminal, and Simulator using Rosetta (I have several libs that does not support arm64 simulator yet)
When building, running the apps in the simulator, it works fine, as it run the UI testing
Unfortunately, it shows the same error when running the Unit Test
Perhaps it is because of this
The system prevents you from mixing arm64 code and x86_64 code in the same process
Since when we open the Xcode, the arch type is Intel, but the CoreSimulatorService and testmanagerd is running using arch Apple
Yes, apparently Xcode 12.5 are using Clang 10 that require you to cast it to idNSCopying
Example: https://github.com/facebook/FBRetainCycleDetector/pull/95/files
And if you are using Cocoapods, FBRetainCycleDetector makes that error, you need to specify the commit hash to make sure it using the latest version
ruby
pod 'FBRetainCycleDetector', { :git = 'https://github.com/facebook/FBRetainCycleDetector.git', :commit = '32c4afc1' }