This could, in extreme cases, result in a crash due to the wrong line
number being out of bounds of the file line count.

BUG=709831

Change-Id: I08ec75362d49c4a72e7ee9fd489d5f9baa6d31bd
Reviewed-on: https://chromium-review.googlesource.com/472648Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>