There was a bug in 7.55.0 that causes the build to fail on ppc (see $URL). It's fixed in 7.55.1. Presumably it's not worth backporting the patch to 7.55.0 and I should just stabilize 7.55.1 for bug 626776 instead. Just want confirmation.
okay i'm on the ppc team. i'll drop the ppc keyword on 7.55.0 and stabilize 7.55.1 once i test.
okay i took care of it.