t.Fatal(err)
	}
	var buf [256]byte
	n, err := conn.Read(buf[:])
	if err != nil {
		t.Fatal(err)
	}
	if string(buf[:n]) != string(payload) {
		t.Error("unexpected payload")
		t.Logf("expect: %d bytes (%v)", len(payload), payload)
		t.Logf("actual: %d bytes (%v)", n, buf[:n])
	}

		minor = atoi(string(matches[2][1:]))
	}
	if len(matches[3]) > 0 {
		patch = atoi(string(matches[3][1:]))
	}
	if parseError != nil {
		t.Logf("error parsing swig version %q, continuing anyway: %s", string(matches[0]), parseError)
		return
	}
	t.Logf("found swig version %d.%d.%d", major, minor, patch)
	if major < 3 || (major == 3 && minor == 0 && patch < 6) {
		t.Skip("test requires swig 3.0.6 or later")
	}

	cmd += " --manifests=" + string(snapshotCharts)

	gotYAML, err := runCommand(cmd)
	if err != nil {
		t.Fatal(err)
	}

	if refreshGoldenFiles() {
		t.Logf("Refreshing golden file for %s", goldenFilepath)
		if err := os.WriteFile(goldenFilepath, []byte(gotYAML), 0o644); err != nil {
			t.Error(err)
		}
	}

	wantYAML, err := readFile(goldenFilepath)
	if err != nil {

	cmd.Stdout = &stdout
	cmd.Stderr = &stderr

	err = testenv.CleanCmdEnv(cmd).Run()
	if err != nil {
		t.Fatalf("exit status: %v\n%s", err, stderr.String())
	}

	t.Logf("raw stdout: %q", stdout.String())
	t.Logf("raw stderr: %q", stderr.String())

	f1, err1 := parseFakeTime(stdout.Bytes())
	if err1 != nil {
		t.Fatal(err1)
	}
	f2, err2 := parseFakeTime(stderr.Bytes())
	if err2 != nil {

	switch runtime.GOOS {
	case "plan9", "windows", "js", "wasip1":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

	for _, tt := range fileConnTests {
		if !testableNetwork(tt.network) {
			t.Logf("skipping %s test", tt.network)
			continue
		}

		var network, address string
		switch tt.network {
		case "udp":
			c := newLocalPacketListener(t, tt.network)
			defer c.Close()

		nproc = 7
	}
	if setNproc {
		var rlim syscall.Rlimit
		if syscall.Getrlimit(nproc, &rlim) == nil {
			max := int(rlim.Cur) / (threads + 5)
			if attempts > max {
				t.Logf("lowering attempts from %d to %d for RLIMIT_NPROC", attempts, max)
				attempts = max
			}
		}
	}

	if os.Getenv("test18146") == "exec" {
		runtime.GOMAXPROCS(1)
		for n := threads; n > 0; n-- {
			go func() {

	if err != nil {
		t.Fatal(err)
	}

	out, err := testenv.Command(t, testenv.GoToolPath(t), "build", "-o", exe, src).CombinedOutput()
	t.Logf("build output:\n%s", out)
	if err != nil {
		t.Fatal(err)
	}

	out, err = testenv.Command(t, exe).CombinedOutput()
	t.Logf("exec output:\n%s", out)
	if err != nil {
		t.Fatal(err)
	}
}

const testExecutableDeletion = `package main

import (
	"fmt"

			if c > len(zstdExp) {
				c = len(zstdExp)
			}
			goExp = goExp[:c]
			zstdExp = zstdExp[:c]
			if !bytes.Equal(goExp, zstdExp) {
				t.Error("byte mismatch after error")
				t.Logf("Go error: %v\n", goErr)
				t.Logf("zstd error: %v\n", zstdErr)
				showDiffs(t, zstdExp, goExp)
			}
		}
	})

	// fully implemented yet on Plan 9 and Windows.
	switch runtime.GOOS {
	case "windows", "js", "wasip1":
		if network == "file+net" {
			t.Logf(format, args...)
			return
		}
	case "plan9":
		t.Logf(format, args...)
		return
	}
	t.Fatalf(format, args...)

package failfast

import "testing"

func TestA(t *testing.T) {
	// Edge-case testing, mixing unparallel tests too
	t.Logf("LOG: %s", t.Name())
}

func TestFailingA(t *testing.T) {
	t.Errorf("FAIL - %s", t.Name())
}

func TestB(t *testing.T) {
	// Edge-case testing, mixing unparallel tests too
	t.Logf("LOG: %s", t.Name())
}

func TestParallelFailingA(t *testing.T) {
	t.Parallel()
	t.Errorf("FAIL - %s", t.Name())
}