fullArgs := makeFullArgs(table, chain)

	runner.mu.Lock()
	defer runner.mu.Unlock()

	out, err := runner.run(opCreateChain, fullArgs)
	if err != nil {
		if ee, ok := err.(utilexec.ExitError); ok {
			if ee.Exited() && ee.ExitStatus() == 1 {
				return true, nil
			}
		}
		return false, fmt.Errorf("error creating chain %q: %v: %s", chain, err, out)
	}
	return false, nil
}

			}
			if err := cmd.Run(); err == nil {
				if !sig && dest < 3 {
					t.Errorf("unexpected success of write to closed pipe %d sig %t in child", dest, sig)
				}
			} else if ee, ok := err.(*exec.ExitError); !ok {
				t.Errorf("unexpected exec error type %T: %v", err, err)
			} else if ws, ok := ee.Sys().(syscall.WaitStatus); !ok {
				t.Errorf("unexpected wait status type %T: %v", ee.Sys(), ee.Sys())

						// cmd.exe disagrees. Probably the test case is wrong?
						t.Fatalf("%v\n\tresolved to %s\n\twant %s", cmd, gotAbs, wantAbs)
					}
				} else if tt.wantErr == nil {
					if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
						t.Fatalf("%v: %v\n%s", cmd, err, ee.Stderr)
					}
					t.Fatalf("%v: %v", cmd, err)
				}
			}

			got, err := exec.LookPath(tt.searchFor)
			if filepath.IsAbs(got) {

		cmd.Env = append(cmd.Environ(), "GO_WANT_HELPER_PROCESS=1")
		out, err := cmd.CombinedOutput()
		t.Logf("%v:\n%s", cmd, out)
		if _, ok := err.(*exec.ExitError); !ok {
			t.Fatal(err)
		}

		// Because the outer subtests (and TestRunningTests itself) are marked as
		// parallel, their test functions return (and are no longer “running”)

func expectSignal(t *testing.T, err error, sig1, sig2 syscall.Signal) bool {
	t.Helper()
	if err == nil {
		t.Error("test program succeeded unexpectedly")
	} else if ee, ok := err.(*exec.ExitError); !ok {
		t.Errorf("error (%v) has type %T; expected exec.ExitError", err, err)
	} else if ws, ok := ee.Sys().(syscall.WaitStatus); !ok {
		t.Errorf("error.Sys (%v) has type %T; expected syscall.WaitStatus", ee.Sys(), ee.Sys())

		return
	}
	cmd := exec.CommandContext(ctx, cmdStr, args...)
	cmd.Stdout = w
	cmd.Stderr = w

	if err := cmd.Run(); err != nil {
		if _, ok := err.(*exec.ExitError); ok {
			return
		}
		if previousBoot == 0 {
			fmt.Fprintf(w, "\nerror: journal output not available\n")
		}
	}
}

	goCmd(t, "build", "-o", "forkexec.exe", "./forkexec/main.go")

	for i := 0; i < 100; i++ {
		cmd := testenv.Command(t, "./forkexec.exe", "1")
		err := cmd.Run()
		if err != nil {
			if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
				t.Logf("stderr:\n%s", ee.Stderr)
			}
			t.Errorf("running command failed: %v", err)
			break
		}
	}
}

func TestSymbolNameMangle(t *testing.T) {

	out, _ := cmd.CombinedOutput()
	return string(out) == "true\n"
}

func errchk(c *exec.Cmd, files []string, t *testing.T) {
	output, err := c.CombinedOutput()
	if _, ok := err.(*exec.ExitError); !ok {
		t.Logf("vet output:\n%s", output)
		t.Fatal(err)
	}
	fullshort := make([]string, 0, len(files)*2)
	for _, f := range files {
		fullshort = append(fullshort, f, filepath.Base(f))
	}

		if err == nil {
			if len(out) > 0 && !lost {
				t.Errorf("iteration %d: unexpected output", i)
			}
		} else {
			if ee, ok := err.(*exec.ExitError); !ok {
				t.Errorf("iteration %d: error (%v) has type %T; expected exec.ExitError", i, err, err)
			} else if ws, ok := ee.Sys().(syscall.WaitStatus); !ok {
				t.Errorf("iteration %d: error.Sys (%v) has type %T; expected syscall.WaitStatus", i, ee.Sys(), ee.Sys())

	}
	cmd := exec.Command(goTool, "list", "-e", "-f", "{{.ImportPath}}:{{.Standard}}{{with .Module}}:{{.Path}}:{{.Dir}}{{end}}", ".")
	out, err := cmd.Output()
	if err != nil {
		if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
			return errorf("%v: %s", cmd, ee.Stderr)
		}
		return errorf("%v: %w", cmd, err)
	}

	parts := strings.SplitN(string(bytes.TrimSpace(out)), ":", 4)
	if len(parts) < 2 {