Ticket 12888 is not mentioned in [1] but I assume this might be related to bug #616468. [1] http://bugs.icu-project.org/trac/query?status=closed&resolution=fixed&resolution=fixedbyotherticket&milestone=59.1&milestone=59m1&group=component&max=999&col=id&col=summary&col=resolution&col=milestone&col=status&col=owner&col=type&col=priority&col=project&col=weeks&order=priority
This release breaks lots of reverse deps because of conflicting types. See URL.
Yes, so let's get it in the tree, mask it and test?
commit c9010a3d92803ef8e22d682a046dc9355f51796c Author: Andreas K. Hüttel <dilfridge@gentoo.org> Date: Sat May 13 23:39:25 2017 +0200 package.mask: Add mask for ICU 59 profiles/package.mask | 5 +++++ 1 file changed, 5 insertions(+) commit 6be75f73a415870ff589aa53e2f34e98a0229fe4 Author: Andreas K. Hüttel <dilfridge@gentoo.org> Date: Sun May 14 00:40:11 2017 +0200 dev-libs/icu: Version bump (masked) Package-Manager: Portage-2.3.5, Repoman-2.3.2 dev-libs/icu/Manifest | 1 + dev-libs/icu/icu-59.1.ebuild | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 157 insertions(+)