Xcode Swift: Resetting zone allocator - Memory

Can you spot the part of code that triggers the error message ?

I know where it happens and how to make it happen. But I don’t get any error message that takes me to specific line of code or view.

How would you try to solve it?

In case it helps, that "[Memory] Resetting zone allocator ..." message comes from geo::MallocZoneAllocator::reset() in VectorKit.framework. It pertains to memory zones used in maps-related functionality. I work on Dev Tools not maps so I don't know what triggers that call to reset() or what it means. I don't think Instruments will be able to narrow down what is causing that.

You said "I tried looking for the issue in the Instruments app and I see a memory leak with the responsibility message 'Allocated prior to attach.' I can't figure out what this means." That leak is not necessarily related to the "Resetting zone allocator" message. When you used Instruments, did you attach to an already-running process, or did you launch the process from the Leaks template? Instruments has no way to get backtraces of allocations that happened before attaching, or that happen early in launching prior to when the Allocations instrument is initialized. So if you attached and the memory that was leaked had already been allocated, you won't see a backtrace. You may be able to get a backtrace for it by launching from Instruments.