panic: hashed over a positive child "file0"

goroutine 1556627 [running]:
DIAGNOSIS:
I0402 14:14:31.456167   11188 x:0] ***************************
I0402 14:14:31.456226   11188 x:0] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=none debug -stacks ci-gvisor-main-1]
I0402 14:14:31.456252   11188 x:0] Version release-20190304.1-70-g1df3fa699774
I0402 14:14:31.456261   11188 x:0] PID: 11188
I0402 14:14:31.456268   11188 x:0] UID: 0, GID: 0
I0402 14:14:31.456271   11188 x:0] Configuration:
I0402 14:14:31.456273   11188 x:0] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0402 14:14:31.456276   11188 x:0] 		Platform: ptrace
I0402 14:14:31.456293   11188 x:0] 		FileAccess: shared, overlay: false
I0402 14:14:31.456299   11188 x:0] 		Network: none, logging: false
I0402 14:14:31.456304   11188 x:0] 		Strace: false, max size: 1024, syscalls: []
I0402 14:14:31.456307   11188 x:0] ***************************
D0402 14:14:31.456323   11188 x:0] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-1"
D0402 14:14:31.457664   11188 x:0] Signal container "ci-gvisor-main-1": signal 0
D0402 14:14:31.457684   11188 x:0] Signal sandbox "ci-gvisor-main-1"
D0402 14:14:31.457688   11188 x:0] Connecting to sandbox "ci-gvisor-main-1"
D0402 14:14:31.457930   11188 x:0] urpc: successfully marshalled 96 bytes.
I0402 14:14:31.942977   11188 x:0] Found sandbox "ci-gvisor-main-1", PID: 16339
I0402 14:14:31.942999   11188 x:0] Retrieving sandbox stacks
D0402 14:14:31.943005   11188 x:0] Stacks sandbox "ci-gvisor-main-1"
D0402 14:14:31.943010   11188 x:0] Connecting to sandbox "ci-gvisor-main-1"
D0402 14:14:31.943072   11188 x:0] urpc: successfully marshalled 36 bytes.
W0402 14:14:31.988982   11188 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-main-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-main-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer