Honza, that bug affects Windows only code, but the crash volume is almost all Mac. We haven't touched the Mac icon channel implementation in quite some time, so if it is somehow related to how the Mac implementation uses the stream, it would be because something else changed....
Bug 1556076 Comment 12 Edit History
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Honza, that bug affects Windows only code, but the crash volume is almost all Mac. We haven't touched the Mac icon channel implementation in quite some time, so if it is somehow related to how the Mac implementation uses the stream, it would be because something else changed.... (I will investigate from the imagelib side in the meantime.)