This bug is shown in bug 239568: when the CSP test times out, the report.py script sends an empty array ('[]') to the checkReport.sub.js script; but the latter script expects, at minimum, the array's zero-ith index is defined. As a result, we get an error like: > undefined is not an object (evaluating 'data[0]["body"]')
<rdar://problem/97384573>
Pull request: https://github.com/webkit/WebKit/pull/2618
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/34932