t3.End()
	trace.Stop()
	t2.End()
	t0.End()
}

func do(ctx context.Context, k int) {
	trace.Log(ctx, "log", "before do")

	var t *trace.Task
	ctx, t = trace.NewTask(ctx, "do")
	defer t.End()

	trace.Log(ctx, "log2", "do")

	// Create a region and spawn more tasks and more workers.
	trace.WithRegion(ctx, "fanout", func() {
		for i := 0; i < k; i++ {
			go func(i int) {

		gran := scenario.gran
		tag := mode + "_" + gran
		incfg = writePkgConfig(t, instdira, tag, ppath, pname, gran, "")
		ofs, outcfg, _ := runPkgCover(t, instdira, tag, incfg, mode,
			apkgfiles, false)
		t.Logf("outfiles: %+v\n", ofs)

		// Run the compiler on the files to make sure the result is
		// buildable.
		bargs := []string{"tool", "compile", "-p", "a", "-coveragecfg", outcfg}
		bargs = append(bargs, ofs...)

	for _, typeName := range typeNames {
		s := Structural{
			Generic: Generic{
				Type: typeName,
			},
		}

		errs := validateStructuralMetadataInvariants(&s, true, rootLevel, nil)
		if len(errs) != 0 {
			t.Logf("errors returned: %v", errs)
		}
		if len(errs) != 0 && typeName == "object" {
			t.Errorf("unexpected forbidden field validation errors for: %#v", s)
		}
		if len(errs) == 0 && typeName != "object" {

		if !got[want] {
			t.Errorf("%q is no longer inlinable", want)
			continue
		}
		delete(got, want)
	}
	for sym := range got {
		if strings.Contains(sym, ".func") {
			continue
		}
		t.Logf("not in expected set, but also inlinable: %q", sym)

	}

	r := &Resolver{
		PreferGo: true,
		Dial: newResolverDialFunc(&resolverDialHandler{
			StartDial: func(network, address string) error {
				t.Logf("StartDial(%q, %q) ...", network, address)
				return nil
			},
			Question: func(h dnsmessage.Header, q dnsmessage.Question) {
				t.Logf("Header: %+v for %q (type=%v, class=%v)", h,
					q.Name.String(), q.Type, q.Class)
			},

		serverConfig.BuildNameToCertificate()

		clientErr, _ := boringHandshake(t, clientConfig, serverConfig)

		if (clientErr == nil) == ok {
			if ok {
				t.Logf("%s: accept", desc)
			} else {
				t.Logf("%s: reject", desc)
			}
		} else {
			if ok {
				t.Errorf("%s: BAD reject (%v)", desc, clientErr)
			} else {
				t.Errorf("%s: BAD accept", desc)
			}
		}
	}

	handler := http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
		t.Logf("request: %+v", *req)
		switch req.URL.Path {
		default:
			t.Logf("The request contains path: %v", req.URL)
			resp.WriteHeader(http.StatusOK)
		}
	})

	server.httpServer = httptest.NewTLSServer(handler)

	t.Logf("Serving TLS at: %v", server.httpServer.URL)

	return server
}

		argv = append(argv, peimporteddlls()...)
	}

	argv = ctxt.passLongArgsInResponseFile(argv, altLinker)

	if ctxt.Debugvlog != 0 {
		ctxt.Logf("host link:")
		for _, v := range argv {
			ctxt.Logf(" %q", v)
		}
		ctxt.Logf("\n")
	}

	cmd := exec.Command(argv[0], argv[1:]...)
	out, err := cmd.CombinedOutput()
	if err != nil {

				// assertion following this.
				if !testCase.versioned {
					if len(testCase.resultL.Objects) != len(resultL.Objects) {
						t.Logf("want: %v", objInfoNames(testCase.resultL.Objects))
						t.Logf("got: %v", objInfoNames(resultL.Objects))

	}

	// We couldn't observe the expected idle time even once.
	for i, dt := range failureIdleTimes {
		t.Logf("try %2d: idle time = %.5fs\n", i+1, dt)
	}
	t.Logf("try %d breakdown:\n", len(failureIdleTimes))
	for i := range names {
		if m1[i].Value.Kind() == metrics.KindBad {
			continue
		}
		t.Logf("\t%s %0.3f\n", names[i], m2[i].Value.Float64()-m1[i].Value.Float64())
	}