Repository: eslint/eslint
File: lib/linter/code-path-analysis/fork-context.js (JavaScript)

Code before:

        for (let j = normalizedBegin; j <= normalizedEnd; ++j) {
            allPrevSegments.push(list[j][i]);
        }

        // note: `create` is just a wrapper that augments `new CodePathSegment`.
        segments.push(create(context.idGenerator.next(), allPrevSegments));
    }

    return segments;
}

/**
 * Inside of a `finally` block we end up with two parallel paths. If the code path
 * exits by a control statement (such as `break` or `continue`) from the `finally`
 * block, then we need to merge the remaining parallel paths back into one.
 * @param {ForkContext} context The fork context to work on.
 * @param {Array<CodePathSegment>} segments Segments to merge.
 * @returns {Array<CodePathSegment>} The merged segments.
 */
function mergeExtraSegments(context, segments) {
    let currentSegments = segments;

    /*
     * We need to ensure that the array returned from this function contains no more
     * that the number of segments that the context allows. `context.count` indicates
     * how many items should be in the returned array to ensure that the new segment
     * entries will line up with the already existing segment entries.
     */
    while (currentSegments.length > context.count) {
        const merged = [];

        /*
         * Because `context.count` is a factor of 2 inside of a `finally` block,
         * we can divide the segment count by 2 to merge the paths together.
         * This loops through each segment in the list and creates a new `CodePathSegment`
         * that has the segment and
         *
         * If `currentSegments` is [a,b,c,d], this will create new segments e and f, such
         * that:
         *
         * When `i` is 0:
         * a->e
         * c->e
         *
         * When `i` is 1:
         * b->f
         * d->f
         */
        for (let i = 0, length = Math.floor(currentSegments.length / 2); i < length; ++i) {
            merged.push(CodePathSegment.newNext(

Review comment (suggestion):
```suggestion
     * than the number of segments that the context allows. `context.count` indicates
```

Code after:

        for (let j = normalizedBegin; j <= normalizedEnd; ++j) {
            allPrevSegments.push(list[j][i]);
        }

        // note: `create` is just a wrapper that augments `new CodePathSegment`.
        segments.push(create(context.idGenerator.next(), allPrevSegments));
    }

    return segments;
}

/**
 * Inside of a `finally` block we end up with two parallel paths. If the code path
 * exits by a control statement (such as `break` or `continue`) from the `finally`
 * block, then we need to merge the remaining parallel paths back into one.
 * @param {ForkContext} context The fork context to work on.
 * @param {Array<CodePathSegment>} segments Segments to merge.
 * @returns {Array<CodePathSegment>} The merged segments.
 */
function mergeExtraSegments(context, segments) {
    let currentSegments = segments;

    /*
     * We need to ensure that the array returned from this function contains no more
     * than the number of segments that the context allows. `context.count` indicates
     * how many items should be in the returned array to ensure that the new segment
     * entries will line up with the already existing segment entries.
     */
    while (currentSegments.length > context.count) {
        const merged = [];

        /*
         * Because `context.count` is a factor of 2 inside of a `finally` block,
         * we can divide the segment count by 2 to merge the paths together.
         * This loops through each segment in the list and creates a new `CodePathSegment`
         * that has the segment and the segment two slots away as previous segments.
         *
         * If `currentSegments` is [a,b,c,d], this will create new segments e and f, such
         * that:
         *
         * When `i` is 0:
         * a->e
         * c->e
         *
         * When `i` is 1:
         * b->f
         * d->f
         */
        for (let i = 0, length = Math.floor(currentSegments.length / 2); i < length; ++i) {
            merged.push(CodePathSegment.newNext(