generally the rule seems to be, find the code where bz says "oh dear, this might be a problem" and work back from there. BTW I've no idea where to start about tests here.
Bug 1570799 Comment 13 Edit History
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generally the rule seems to be, find the comment where bz says "oh dear, this might be a problem" and work back from there. BTW I've no idea where to start about tests here.