fs: TestFileFdLeak is flaky about go-fuse HOT 2 CLOSED

(neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/github.com/hanwen/go-fuse/fs$ go test -run TestFileFdLeak -count 1000 -failfast
--- FAIL: TestFileFdLeak (0.05s)
    simple_test.go:178: found 4 used file handles, should be <= 3
FAIL
exit status 1
FAIL    github.com/hanwen/go-fuse/fs    0.520s

(neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/github.com/hanwen/go-fuse/fs$ go test -run TestFileFdLeak -count 1000 -failfast
11:39:00.300614 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:04.951491 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:05.835799 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:07.220097 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:07.293378 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
PASS
ok      github.com/hanwen/go-fuse/fs    15.908s

(neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/github.com/hanwen/go-fuse/fs$ go test -run TestFileFdLeak -count 1000 -failfast
11:39:15.729319 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:15.759519 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:16.958485 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:17.055378 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
11:39:20.155459 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
--- FAIL: TestFileFdLeak (0.02s)
    simple_test.go:178: found 4 used file handles, should be <= 3
FAIL
exit status 1
FAIL    github.com/hanwen/go-fuse/fs    5.020s

(neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/github.com/hanwen/go-fuse/fs$ go test -run TestFileFdLeak -count 1000 -failfast
--- FAIL: TestFileFdLeak (0.05s)
    simple_test.go:178: found 4 used file handles, should be <= 3
FAIL
exit status 1
FAIL    github.com/hanwen/go-fuse/fs    1.032s

(neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/github.com/hanwen/go-fuse/fs$ go test -run TestFileFdLeak -count 1000 -failfast
11:39:24.733796 writer: Write/Writev failed, err: 2=no such file or directory. opcode: RELEASE
--- FAIL: TestFileFdLeak (0.01s)
    simple_test.go:178: found 4 used file handles, should be <= 3
FAIL
exit status 1
FAIL    github.com/hanwen/go-fuse/fs    4.649s