panic: interface conversion: refs.RefCounter is *fs.File, not *fs.Dirent

DIAGNOSIS:
I0124 01:33:00.995354   29010 x:0] ***************************
I0124 01:33:00.995367   29010 x:0] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=none debug -stacks --ps ci-gvisor-main-0]
I0124 01:33:00.995390   29010 x:0] Version release-20200115.0-70-gcb3906ae0057
I0124 01:33:00.995395   29010 x:0] PID: 29010
I0124 01:33:00.995402   29010 x:0] UID: 0, GID: 0
I0124 01:33:00.995408   29010 x:0] Configuration:
I0124 01:33:00.995412   29010 x:0] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0124 01:33:00.995415   29010 x:0] 		Platform: ptrace
I0124 01:33:00.995419   29010 x:0] 		FileAccess: shared, overlay: false
I0124 01:33:00.995427   29010 x:0] 		Network: none, logging: false
I0124 01:33:00.995433   29010 x:0] 		Strace: false, max size: 1024, syscalls: []
I0124 01:33:00.995437   29010 x:0] ***************************
D0124 01:33:00.996362   29010 x:0] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-0"
D0124 01:33:00.997722   29010 x:0] Signal container "ci-gvisor-main-0": signal 0
D0124 01:33:00.997740   29010 x:0] Signal sandbox "ci-gvisor-main-0"
D0124 01:33:00.997749   29010 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0124 01:33:00.999516   29010 x:0] urpc: successfully marshalled 96 bytes.
I0124 01:33:01.398466   29010 x:0] Found sandbox "ci-gvisor-main-0", PID: 58007
I0124 01:33:01.398483   29010 x:0] Retrieving sandbox stacks
D0124 01:33:01.399120   29010 x:0] Stacks sandbox "ci-gvisor-main-0"
D0124 01:33:01.399148   29010 x:0] Connecting to sandbox "ci-gvisor-main-0"
D0124 01:33:01.399209   29010 x:0] urpc: successfully marshalled 36 bytes.
W0124 01:33:01.547416   29010 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-main-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-main-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
W0124 01:33:01.547532   29010 x:0] Failure to execute command, err: 1