repository('useless1') {
                                    resolverClass = UselessToolchainResolver1
                                }
                                repository('useless2') {
                                    resolverClass = UselessToolchainResolver2
                                }
                                repository('useless3') {

	}
	t.Parallel()

	// Use TempDir() to make sure we're on a local file system,
	// so that the group ids returned by Getgroups will be allowed
	// on the file. On NFS, the Getgroups groups are
	// basically useless.
	f := newFile("TestChown", t)
	defer Remove(f.Name())
	defer f.Close()
	dir, err := f.Stat()
	if err != nil {
		t.Fatalf("stat %s: %s", f.Name(), err)
	}

	// Can't change uid unless root, but can try

// byte) and EOF at once in its Read call.
type byteAndEOFReader byte

func (b byteAndEOFReader) Read(p []byte) (n int, err error) {
	if len(p) == 0 {
		// Read(0 bytes) is useless. We expect no such useless
		// calls in this test.
		panic("unexpected call")
	}
	p[0] = byte(b)
	return 1, EOF
}

// This used to yield bytes forever; issue 16795.

}

func mustRecoverBody(v1, v2, v3, x interface{}) {
	v := v1
	if v != nil {
		println("spurious recover", v)
		die()
	}
	v = v2
	if v == nil {
		println("missing recover", x.(int))
		die() // panic is useless here
	}
	if v != x {
		println("wrong value", v, x)
		die()
	}

	// the value should be gone now regardless
	v = v3
	if v != nil {
		println("recover didn't recover")
		die()
	}
}

	if plState == nil {
		klog.V(7).Infof("plName=%s, plState==nil", plName)
		return
	}
	useless := plState.quiescing && plState.numPending == 0 && plState.queues.IsIdle()
	klog.V(7).Infof("plState.quiescing=%v, plState.numPending=%d, useless=%v", plState.quiescing, plState.numPending, useless)
	if !useless {
		return
	}

			return fmt.Errorf("failed to remount /: %v", err)
		}
		// In CNI, we are running the pod network namespace, but the host filesystem. Locking the host is both useless and harmful,
		// as it opens the risk of lock contention with other node actors (such as kube-proxy), and isn't actually needed at all.
		// Older iptables cannot turn off the lock explicitly, so we hack around it...

		// mapping the ID of the address to a shadowRange where future writes will happen.
		// Since we're walking backwards, writes to a shadowed region are useless,
		// as they will be immediately overwritten.
		shadowed.clear()
		v := last

	walkloop:
		if loadUse.contains(v.ID) {
			// Someone might be reading this memory state.
			// Clear all shadowed addresses.

		return nil, errors.New("res_ninit failure: " + err.Error())
	}
	defer _C_res_nclose(state)

	// Some res_nsearch implementations (like macOS) do not set errno.
	// They set h_errno, which is not per-thread and useless to us.
	// res_nsearch returns the size of the DNS response packet.
	// But if the DNS response packet contains failure-like response codes,
	// res_search returns -1 even though it has copied the packet into buf,

		// latest-1.7 version is v1.7.4-beta.0

		// Worth noticing is that when the release-1.X branch is cut; there are two versions tagged: v1.X.0-beta.0 AND v1.(X+1).alpha.0
		// The v1.(X+1).alpha.0 is pretty much useless and should just be ignored, as more betas may be released that have more features than the initial v1.(X+1).alpha.0

		return false
	}

	// Pick some upper bound for the number of instructions
	// we'd be willing to execute just to generate a dead
	// argument to CondSelect. In the worst case, this is
	// the number of useless instructions executed.
	const maxfuseinsts = 2

	if len(simple.Values) > maxfuseinsts || !canSpeculativelyExecute(simple) {
		return false
	}

	// Replace Phi instructions in b with CondSelect instructions