Created attachment 364776 [details, diff] patch for ebuild dev-python/dogpile-core is required at run time, but ebuild has it only in DEPEND.
fixed in tree
But why ebuild now has '>=dev-python/dogpile-core-0.4.1[${PYTHON_USEDEP}]' twice? Is there some reason for not using ${RDEPEND} in DEPEND=? Also idella4 told dogpile-core is not required at build aka tests time.
It is required at test time.