linux-s390x-ibm at b143c981693a0f405f16eade1cccf4933fde8e21 building sync at b637f27e40ad6e222f3d301cc113e635f0fa08be

:: Running /data/golang/workdir/go/bin/go with args ["/data/golang/workdir/go/bin/go" "test" "-short" "-timeout=50m0s" "./..."] and env ["LANG=en_US.UTF-8" "HOME=/root" "LOGNAME=root" "USER=root" "SHELL=/bin/sh" "INVOCATION_ID=3a0bf36367ff4b8ab00a0deade4049a8" "JOURNAL_STREAM=9:358667023" "META_BUILDLET_BINARY_URL=https://storage.googleapis.com/go-builder-data/buildlet.linux-s390x" "GO_STAGE0_NET_DELAY=100ms" "GO_STAGE0_DL_DELAY=400ms" "WORKDIR=/data/golang/workdir" "GOROOT_BOOTSTRAP=/data/golang/workdir/go1.4" "GO_BUILDER_NAME=linux-s390x-ibm" "GO_BUILDER_FLAKY_NET=1" "GO_TEST_TIMEOUT_SCALE=5" "GOROOT=/data/golang/workdir/go" "GOPATH=/data/golang/workdir/gopath" "GOPROXY=https://proxy.golang.org" "GO_DISABLE_OUTBOUND_NETWORK=0" "TMPDIR=/data/golang/workdir/tmp" "GOCACHE=/data/golang/workdir/gocache" "GOPLSCACHE=/data/golang/workdir/goplscache" "PATH=/data/golang/workdir/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin" "PWD=/data/golang/workdir/gopath/src/golang.org/x/sync"] in dir /data/golang/workdir/gopath/src/golang.org/x/sync

ok  	golang.org/x/sync/errgroup	0.076s
ok  	golang.org/x/sync/semaphore	12.082s
ok  	golang.org/x/sync/singleflight	0.071s
ok  	golang.org/x/sync/syncmap	0.041s