Gentoo's Bugzilla –
Attachment 366214 Details for
Bug 496050net-dns/bind-9.9.4_p1 with sys-devel/gcc-4.9-20131222 CFLAGS=-O2 -ggdb - /usr/sbin/named: Abort in assertion_failed (file=0xc <Address 0xc out of bounds>, line=-143514064, type=4766072, cond=0x7f17f7722638 "") at ./main.c:218