Engineers Trace an Intermittent iOS SIGBUS Crash Through Controlled Experiments

An InfoQ case study describes how engineers investigated a production crash in a large-scale iOS consumer app that produced no clean stack trace and could not be reproduced locally. The crash was intermittent, and the team turned a vague SIGBUS report into a structured set of experiments to isolate its cause. The final fix was a small code change.

Why it matters: It offers a practical method for diagnosing hard-to-reproduce production crashes when standard stack traces and local reproduction fail.