Actual stable version of btrfs-progs 3.14.2 was released in May 2014 and is realy old now. Maintainer please choose the appropriate version to be stabilized. Reproducible: Always
Let's go with 4.0.1, to roughly match gentoo-sources.
arm stable
ppc stable
amd64 stable
x86 stable
Stable for PPC64. Closing.