Thanks for the post, my guess here is your process is called KSCrash? The crash file should be posted as an attachment to be able to analyze. Kindly submit a comprehensive crash report, adhering to the guidelines outlined in Posting a Crash Report. https://developer.apple.com/forums/thread/688669 As you said, the error typically indicates that your application is trying to access memory that has already been deallocated or is otherwise invalid. Although you mentioned using Address Sanitizer, double-check your configuration to ensure it's correctly enabled. Sometimes, specific project settings might prevent tools from working as expected. If you're using collections that hold objects, ensure they are not being modified. Use or breakpoints to trace object lifetimes and ensure they are being deallocated when expected. This can help pinpoint where the object is being released prematurely. If you're using third-party libraries, ensure they are up-to-date, as bugs in libraries can manifest similarly. However it see