} else {
		// Already owned: add a channel to wait on.
		wait = make(chan File)
		l.queue = append(l.queue, wait)
	}
	locks[ino] = l
	mu.Unlock()

	if wait != nil {
		wait <- f
	}

	// Spurious EDEADLK errors arise on platforms that compute deadlock graphs at
	// the process, rather than thread, level. Consider processes P and Q, with
	// threads P.1, P.2, and Q.3. The following trace is NOT a deadlock, but will be

	})

	f.Close()
	wait(t)
}

// TestSpuriousEDEADLK verifies that the spurious EDEADLK reported in
// https://golang.org/issue/32817 no longer occurs.
func TestSpuriousEDEADLK(t *testing.T) {
	// 	P.1 locks file A.
	// 	Q.3 locks file B.
	// 	Q.3 blocks on file A.
	// 	P.2 blocks on file B. (Spurious EDEADLK occurs here.)
	// 	P.1 unlocks file A.
	// 	Q.3 unblocks and locks file A.

	"EMLINK":          EMLINK,
	"EPIPE":           EPIPE,
	"ENAMETOOLONG":    ENAMETOOLONG,
	"ENOSYS":          ENOSYS,
	"EDQUOT":          EDQUOT,
	"EDOM":            EDOM,
	"ERANGE":          ERANGE,
	"EDEADLK":         EDEADLK,
	"ENOLCK":          ENOLCK,
	"ENOTEMPTY":       ENOTEMPTY,
	"ELOOP":           ELOOP,
	"ENOMSG":          ENOMSG,
	"EIDRM":           EIDRM,
	"ECHRNG":          ECHRNG,
	"EL2NSYNC":        EL2NSYNC,

	EBADMSG         Errno = 9
	EBUSY           Errno = 10
	ECANCELED       Errno = 11
	ECHILD          Errno = 12
	ECONNABORTED    Errno = 13
	ECONNREFUSED    Errno = 14
	ECONNRESET      Errno = 15
	EDEADLK         Errno = 16
	EDESTADDRREQ    Errno = 17
	EDOM            Errno = 18
	EDQUOT          Errno = 19
	EEXIST          Errno = 20
	EFAULT          Errno = 21
	EFBIG           Errno = 22
	EHOSTUNREACH    Errno = 23

	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x7a)

	ECHRNG          = syscall.Errno(0x25)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x82)
	ECONNREFUSED    = syscall.Errno(0x92)
	ECONNRESET      = syscall.Errno(0x83)
	EDEADLK         = syscall.Errno(0x2d)
	EDEADLOCK       = syscall.Errno(0x38)
	EDESTADDRREQ    = syscall.Errno(0x60)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x46d)

	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x7a)

	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x7a)

	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x23)
	EDESTADDRREQ    = syscall.Errno(0x59)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x7a)

	ECHRNG          = syscall.Errno(0x2c)
	ECOMM           = syscall.Errno(0x46)
	ECONNABORTED    = syscall.Errno(0x67)
	ECONNREFUSED    = syscall.Errno(0x6f)
	ECONNRESET      = syscall.Errno(0x68)
	EDEADLK         = syscall.Errno(0x23)
	EDEADLOCK       = syscall.Errno(0x3a)
	EDESTADDRREQ    = syscall.Errno(0x59)
	EDOTDOT         = syscall.Errno(0x49)
	EDQUOT          = syscall.Errno(0x7a)