This doesn't fix the bug, just avoids it.

Bug: v8:6436
Change-Id: I06305a9baf892e4039f2aaf353fa7edf7b7e325d
Reviewed-on: https://chromium-review.googlesource.com/513242Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45499}