go: cmd/go: permission issue building CGO with Go 1.10

What version of Go are you using (go version)?

1.10

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/<foo>/.cache/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/<foo>/go"
GORACE=""
GOROOT="/usr/lib/go-1.10"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go-1.10/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build884921568=/tmp/go-build -gno-record-gcc-switches"

Intel® Xeon® CPU E5-2680

What did you do?

We have been running a go program that access rocksdb (written in c) via cgo, and it has been running fine under go 1.9. However, after upgrading to 1.10, we get the following error:

go build runtime/cgo: open /usr/lib/go-1.10/pkg/linux_amd64/runtime/cgo.a: permission denied

And the permissions of the cgo files:

ls -l /usr/lib/go-1.10/pkg/linux_amd64/runtime/
total 720
-rw-r--r-- 1 root root  93876 Mar 29 23:49 cgo.a
-rw-r--r-- 1 root root  15674 Mar 29 23:49 debug.a
drwxr-xr-x 2 root root   4096 Mar 29 23:49 internal
drwxr-xr-x 3 root root   4096 Mar 29 23:49 pprof
-rw-r--r-- 1 root root 231096 Mar 29 23:49 pprof.a
-rw-r--r-- 1 root root 378548 Mar 29 23:49 race.a
-rw-r--r-- 1 root root   2614 Mar 29 23:49 trace.a