seniorObjective-C
What happens when a crash occurs at objc_msgSend?
Updated May 17, 2026
Short answer
Crash usually indicates invalid receiver, selector mismatch, or corrupted cache.
Deep explanation
If objc_msgSend receives invalid pointer, it may crash during cache lookup or IMP jump. Common causes include freed objects (EXC_BAD_ACCESS), nil messaging edge cases, or memory corruption.
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