fatal error: too many address space collisions for -race mode
DIAGNOSIS:
I0312 07:00:16.436942   37253 main.go:305] ***************************
I0312 07:00:16.437096   37253 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-2]
I0312 07:00:16.437481   37253 main.go:307] Version release-20200219.0-136-g24e7005ab6bd
I0312 07:00:16.437576   37253 main.go:308] PID: 37253
I0312 07:00:16.437640   37253 main.go:309] UID: 0, GID: 0
I0312 07:00:16.437700   37253 main.go:310] Configuration:
I0312 07:00:16.437768   37253 main.go:311] 		RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root
I0312 07:00:16.437846   37253 main.go:312] 		Platform: ptrace
I0312 07:00:16.437915   37253 main.go:313] 		FileAccess: shared, overlay: false
I0312 07:00:16.438030   37253 main.go:314] 		Network: sandbox, logging: false
I0312 07:00:16.438175   37253 main.go:315] 		Strace: false, max size: 1024, syscalls: []
I0312 07:00:16.438402   37253 main.go:316] ***************************
W0312 07:00:16.438501   37253 main.go:321] Block the TERM signal. This is only safe in tests!
D0312 07:00:16.438826   37253 container.go:159] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0312 07:00:16.447071   37253 container.go:592] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-2": signal 0
D0312 07:00:16.447255   37253 sandbox.go:806] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0312 07:00:16.447411   37253 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0312 07:00:16.447906   37253 urpc.go:534] urpc: successfully marshalled 117 bytes.
I0312 07:00:16.914789   37253 debug.go:128] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2", PID: 29682
I0312 07:00:16.915004   37253 debug.go:137] Retrieving sandbox stacks
D0312 07:00:16.915095   37253 sandbox.go:924] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
D0312 07:00:16.915250   37253 sandbox.go:318] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2"
W0312 07:00:16.915483   37253 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 29682: connection refused
retrieving stacks: connecting to control server at PID 29682: connection refused
W0312 07:00:16.915885   37253 main.go:338] Failure to execute command, err: 1