I just ran into this when creating a test case. The huge spread caused
a RangeError (stack overflow). It's not causing problems for the tests
we currently have, but let's fix it anyway.

R=ahaas@chromium.org

Change-Id: Ib67f059f2981ccc6239ba4ae05611e20eb3aa191
Reviewed-on: https://chromium-review.googlesource.com/c/1329177
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57429}