Why do I see EXC_BAD_ACCESS intermittently on background threads?

EXC_BAD_ACCESS is a common error in Swift that typically signifies an attempt to access a deallocated or invalid memory address. This issue can manifest intermittently, particularly on background threads, due to the nature of concurrent programming and memory management in Swift. When using background threads, it's essential to ensure that all objects accessed are still valid and not released or deallocated prematurely. Below are some potential causes and solutions for handling EXC_BAD_ACCESS on background threads.

    // Example of potential code that could lead to EXC_BAD_ACCESS in Swift
    func performBackgroundTask() {
        DispatchQueue.global().async {
            let object = SomeClass() // Object created on a background thread
            
            // Simulate some background processing
            DispatchQueue.main.async {
                // If 'object' is accessed here without proper management,
                // it could lead to EXC_BAD_ACCESS if it's deallocated.
                print(object.someProperty)
            }
            
            // Object deallocation could happen before this point due to scope
        }
    }