Created attachment 584501 [details] [diff] [review]
Julian found this bug while running valgrind. The counts, totals, and startupTime fields are not getting initialized if MOZ_GCTIMER is unset. This didn't used to be a problem. But now we use the same facility for sending GC info to the error log. It uses the counts data, but not totals or startupTime. I just moved the initialization up.