$ bash -e -o pipefail -c swiftc Sources/main.swift -o app && ./app --self-test && ./app < examples/input.txt
Tests passed
{"currentThickness":9.2,"proposedInspectionYears":2,"remainingYears":6.863193063815397,"slopeMmPerYear":-0.2900000000000002,"slopeSigma":0.01527525231651945}

$ ./app
{"currentThickness":9.2,"proposedInspectionYears":2,"remainingYears":6.863193063815397,"slopeMmPerYear":-0.2900000000000002,"slopeSigma":0.01527525231651945}

$ ./app
Missing input

$ ./app
Finite number required

$ ./app --unsupported
Unsupported command arguments

$ ./app
Input record too large