Bug 2087051 - Speculative crash fix for a possible invalid page index when recording a page impression. Skip the impression and log a warning until the pager adjusts. #427 (firefox-autoland@autoland)

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Branches 2087051 -> autoland
Repo firefox-autoland@autoland (git) (git://github.com/t-p-white/firefox.git)
Author t-p-white
State open
Commit Title

Bug 2087051 - Speculative crash fix for a possible invalid page index when recording a page impression. Skip the impression and log a warning until the pager adjusts.

Commit Body

I am unable to reproduce this locally - it looks like this is only affecting a _very small_ number of devices but this defensive check will prevent crashing and report logging if it happens.

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