seniorObjective-C
Why do some Objective-C crashes only appear on ARM64 devices?
Updated May 17, 2026
Short answer
ARM64 uses stricter alignment, register passing, and memory layout rules exposing hidden bugs.
Deep explanation
ARM64 architecture enforces stricter alignment requirements than older architectures. Bugs like misaligned memory access, pointer truncation, or incorrect struct packing may not crash on x86 simulator but fail on device.
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