fatal error: too many address space collisions for -race mode
DIAGNOSIS:
I0314 15:08:20.774326   14927 main.go:305] ***************************
I0314 15:08:20.774481   14927 main.go:306] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=sandbox -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-proxy-sandbox-race-0]
I0314 15:08:20.774649   14927 main.go:307] Version release-20200219.0-176-g45a8ae240dd1
I0314 15:08:20.774717   14927 main.go:308] PID: 14927
I0314 15:08:20.774814   14927 main.go:309] UID: 0, GID: 0
I0314 15:08:20.774887   14927 main.go:310] Configuration:
I0314 15:08:20.774979   14927 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0314 15:08:20.775055   14927 main.go:312] 		Platform: ptrace
I0314 15:08:20.775146   14927 main.go:313] 		FileAccess: shared, overlay: false
I0314 15:08:20.775248   14927 main.go:314] 		Network: sandbox, logging: false
I0314 15:08:20.775340   14927 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0314 15:08:20.775445   14927 main.go:316] ***************************
W0314 15:08:20.775505   14927 main.go:321] Block the TERM signal. This is only safe in tests!
D0314 15:08:20.775663   14927 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0314 15:08:20.784926   14927 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-0": signal 0
D0314 15:08:20.785126   14927 sandbox.go:814] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0314 15:08:20.785233   14927 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0314 15:08:20.785661   14927 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0314 15:08:20.934331   14927 debug.go:128] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0", PID: 13566
I0314 15:08:20.934484   14927 debug.go:137] Retrieving sandbox stacks
D0314 15:08:20.934588   14927 sandbox.go:932] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
D0314 15:08:20.934682   14927 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-0"
W0314 15:08:20.934878   14927 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 13566: connection refused
retrieving stacks: connecting to control server at PID 13566: connection refused
W0314 15:08:20.935342   14927 main.go:338] Failure to execute command, err: 1