The file /usr/lib/go/src/debug/elf/testdata/gcc-386-freebsd-exec has a broken soname dependency on x86_32 libc.so.6, as shown by emerge --depclean --ignore-built-slot-operator-deps=n: * Dependencies could not be completely resolved due to * the following required packages not being installed: * * x86_32: libc.so.6 pulled in by: * dev-lang/go-1.4.2 The corresponding entry from /var/db/pkg/dev-lang/go-1.5.1/NEEDED.ELF.2 appears as follows: 386;/usr/lib/go/src/debug/elf/testdata/gcc-386-freebsd-exec;;;libc.so.6;x86_32 The emerge error can be suppressed by setting the following variable in the ebuilds: REQUIRES_EXCLUDE="/usr/lib/go/src/debug/elf/testdata/gcc-386-freebsd-exec" We could use a glob instead, as follows: REQUIRES_EXCLUDE="/usr/lib/go/src/debug/elf/testdata/*"
This is fixed in commit 15e4ade. Thanks for the report.