// We keep the codes packed into a uint32, at the most-significant end.
	// So branches are taken from the MSB downwards. This makes it easy to
	// sort them later.
	code := uint32(0)
	length := uint8(32)

	codes := make([]huffmanCode, len(lengths))
	for i := len(pairs) - 1; i >= 0; i-- {
		if length > pairs[i].length {
			length = pairs[i].length
		}
		codes[i].code = code

// Useful for things like loading a file from /tmp/ but saying to the user "Would write file foo to /etc/kubernetes/..."
type FileToPrint struct {
	RealPath  string
	PrintPath string
}

// NewFileToPrint makes a new instance of FileToPrint with the specified arguments
func NewFileToPrint(realPath, printPath string) FileToPrint {
	return FileToPrint{
		RealPath:  realPath,
		PrintPath: printPath,
	}
}

		{`package p13

		var (
		    v = t.m()
		    t = makeT(0)
		)

		type T struct{}

		func (T) m() int { return 0 }

		func makeT(n int) T {
		    if n > 0 {
		        return makeT(n-1)
		    }
		    return T{}
		}`, []string{
			"t = makeT(0)", "v = t.m()",
		}},

			w.reset(OpUnknown)
			break
		}
		if advance {
			slow = slow.Args[0]
		}
		advance = !advance
	}

	// The answer is w.  Update all the copies we saw
	// to point directly to w.  Doing this update makes
	// sure that we don't end up doing O(n^2) work
	// for a chain of n copies.
	for v != w {
		x := v.Args[0]
		v.SetArg(0, w)
		v = x
	}
	return w
}

		{`package p13

		var (
		    v = t.m()
		    t = makeT(0)
		)

		type T struct{}

		func (T) m() int { return 0 }

		func makeT(n int) T {
		    if n > 0 {
		        return makeT(n-1)
		    }
		    return T{}
		}`, []string{
			"t = makeT(0)", "v = t.m()",
		}},

		})
	}
}

func TestPeriodicGC(t *testing.T) {
	if runtime.GOARCH == "wasm" {
		t.Skip("no sysmon on wasm yet")
	}

	// Make sure we're not in the middle of a GC.
	runtime.GC()

	var ms1, ms2 runtime.MemStats
	runtime.ReadMemStats(&ms1)

	// Make periodic GC run continuously.
	orig := *runtime.ForceGCPeriod
	*runtime.ForceGCPeriod = 0

}

// end writes the buffer back into the m.
func (w traceWriter) end() {
	if w.mp == nil {
		// Tolerate a nil mp. It makes code that creates traceWriters directly
		// less error-prone.
		return
	}
	w.mp.trace.buf[w.gen%2] = w.traceBuf
}

// ensure makes sure that at least maxSize bytes are available to write.
//
// Returns whether the buffer was flushed.

    def setup() {
        services = NativeServices.getInstance()
    }

    def "makes a ProcessEnvironment available"() {
        expect:
        services.get(ProcessEnvironment) != null
    }

    def "makes an OperatingSystem available"() {
        expect:
        services.get(OperatingSystem) != null
    }

    def "makes a FileSystem available"() {
        expect:
        services.get(FileSystem) != null

// creating complex traces that are mostly or completely correct.
func (t *Trace) Generation(gen uint64) *Generation {
	g := &Generation{
		trace:   t,
		gen:     gen,
		strings: make(map[string]uint64),
		stacks:  make(map[stack]uint64),
	}
	t.gens = append(t.gens, g)
	return g
}

// Generate creates a test file for the trace.
func (t *Trace) Generate() []byte {
	// Trace file contents.

	}
	if dir == "" {
		return "", false, fmt.Errorf("missing user-config dir")
	}
	return filepath.Join(dir, "go/env"), false, nil
}

func initEnvCache() {
	envCache.m = make(map[string]string)
	envCache.goroot = make(map[string]string)
	if file, _, _ := EnvFile(); file != "" {
		readEnvFile(file, "user")
	}
	goroot := findGOROOT(envCache.m["GOROOT"])
	if goroot != "" {