@TaskAction
    fun execute() {
        val originalChanges = loadChanges()
        val sortedChanges = originalChanges.mapValues {
            sortChanges(it.value)
        }

        val mismatches = originalChanges.mapValues {
            findMismatches(it.value, sortedChanges[it.key]!!)
        }.filterValues {
            it.isNotEmpty()
        }

        if (mismatches.isNotEmpty()) {

		changes["toolchain"] = change{"toolchain", oldToolchain, newToolchain}
	}

	sortedChanges := make([]change, 0, len(changes))
	for _, c := range changes {
		sortedChanges = append(sortedChanges, c)
	}
	sort.Slice(sortedChanges, func(i, j int) bool {
		pi := sortedChanges[i].path
		pj := sortedChanges[j].path
		if pi == pj {
			return false
		}
		// go first; toolchain second
		switch {

        require(ranges.isNotEmpty())

        val sortedRanges = ranges.sortedBy { it.first }
        val rangesToErase = ArrayList<IntRange>(ranges.size + 1)

        var last = 0
        for (range in sortedRanges) {
            rangesToErase.add(last until range.first)
            last = range.last + 1
        }

        val lastIndexToPreserve = sortedRanges.last().last
        if (lastIndexToPreserve < text.lastIndex) {