With icu 61.1-1, virtualbox crashes with an error:
vn@ lx ~ % virtualbox
VirtualBox: supR3HardenedMainGetTrustedMain: dlopen("/usr/lib/virtualbox/VirtualBox.so",) failed: libicui18n.so.60: cannot open shared object file: No such file or directory
Downgrading to icu-60 results in:
vn@ lx ~ % virtualbox
VirtualBox: Error -610 in supR3HardenedMainInitRuntime!
VirtualBox: dlopen("/usr/lib/virtualbox/VBoxRT.so",) failed: libicuuc.so.61: cannot open shared object file: No such file or directory
VirtualBox: Tip! It may help to reinstall VirtualBox.
and not starting X (and I don't use any DM).
As virtualbox is not critical for me, I've reinstalled icu 61.1-1.