Gijs, did you mean to remove bug 1581253 from the list of regressions? You took off bug 1519732 which was certainly caused here.
Bug 1469916 Comment 41 Edit History
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~~Gijs, did you mean to remove bug 1581253 from the list of regressions? You took off bug 1519732 which was certainly caused here.~~ EDIT: Scrap that, you did add bug 1519732, but it's crossed out since we fixed it. Sorry about the noise.