nextEventMatchingMask should only be called from the Main Thread!" · Issue #2 · deepmind/pysc2 · GitHub
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'nextEventMatchingMask should only be called from the Main Thread!' · Issue #7791 · opencv/opencv · GitHub
![Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow](https://i.stack.imgur.com/lazOo.png)
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] - Stack Overflow
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