ctx := trace.StartGoroutine(ctx)
		go func(p string, r *result) {
			r.QueryResult, r.err = queryModule(ctx, p)
			wg.Done()
		}(p, &results[i])
	}
	wg.Wait()

	// Classify the results. In case of failure, identify the error that the user
	// is most likely to find helpful: the most useful class of error at the
	// longest matching path.
	var (
		noPackage      *PackageNotInModuleError

	if n != len(buf) || err != nil || string(buf) != "O:hi\n" {
		t.Fatalf("ReadFull = %d, %v, %q", n, err, buf[:n])
	}
	go cancel()

	if err := c.Wait(); err == nil {
		t.Fatal("expected Wait failure")
	}
}

func TestContextCancel(t *testing.T) {
	if runtime.GOOS == "netbsd" && runtime.GOARCH == "arm64" {
		maySkipHelperCommand("cat")
		testenv.SkipFlaky(t, 42061)
	}

	//     returned.
	switch {
	case s == "":
		// Match with no position information.
		ok = true
		compiled = true
		matched = true
		return
	case s == "NOMATCH":
		// Match failure.
		ok = true
		compiled = true
		matched = false
		return
	case 'A' <= s[0] && s[0] <= 'Z':
		// All the other error codes are compile errors.
		ok = true
		compiled = false
		return
	}

	// and reinvoking the current binary.
	// The special cases =loop and =mismatch skip the
	// setting of TESTGO_VERSION so that it looks like we
	// accidentally invoked the wrong toolchain,
	// to test detection of that failure mode.
	switch TestVersionSwitch {
	case "switch":
		os.Setenv("TESTGO_VERSION", gotoolchain)
		fallthrough
	case "loop", "mismatch":
		exe, err := os.Executable()
		if err != nil {

			}
			return nil
		}); err != nil {
			// Internal errors are marked with f.Fail; user code may call this too, before F.Fuzz.
			// The worker will exit with fuzzWorkerExitCode, indicating this is a failure
			// (and 'go test' should exit non-zero) but a failing input should not be recorded.
			f.Errorf("communicating with fuzzing coordinator: %v", err)
		}

	default:

}

// Read plain text section (XML calls it character data).
// If quote >= 0, we are in a quoted string and need to find the matching quote.
// If cdata == true, we are in a <![CDATA[ section and need to find ]]>.
// On failure return nil and leave the error in d.err.
func (d *Decoder) text(quote int, cdata bool) []byte {
	var b0, b1 byte
	var trunc int
	d.buf.Reset()
Input:
	for {
		b, ok := d.getc()
		if !ok {

// If the file does not exist, WriteFile creates it with permissions perm (before umask);
// otherwise WriteFile truncates it before writing, without changing permissions.
// Since WriteFile requires multiple system calls to complete, a failure mid-operation
// can leave the file in a partially written state.
func WriteFile(name string, data []byte, perm FileMode) error {
	f, err := OpenFile(name, O_WRONLY|O_CREATE|O_TRUNC, perm)
	if err != nil {
		return err

				break
			}
			c.updateStats(result)

			if result.crasherMsg != "" {
				if c.warmupRun() && result.entry.IsSeed {
					target := filepath.Base(c.opts.CorpusDir)
					fmt.Fprintf(c.opts.Log, "failure while testing seed corpus entry: %s/%s\n", target, testName(result.entry.Parent))
					stop(errors.New(result.crasherMsg))
					break
				}
				if c.canMinimize() && result.canMinimize {

				break
			}
		}
	}
}

// Issue 8410
func TestMapSparseIterOrder(t *testing.T) {
	// Run several rounds to increase the probability
	// of failure. One is not enough.
NextRound:
	for round := 0; round < 10; round++ {
		m := make(map[int]bool)
		// Add 1000 items, remove 980.
		for i := 0; i < 1000; i++ {
			m[i] = true
		}

				// Worker exited with a code indicating F.Fuzz was not called correctly,
				// for example, F.Fail was called first.
				return fmt.Errorf("fuzzing process exited unexpectedly due to an internal failure: %w", err)
			}
			// Worker exited non-zero or was terminated by a non-interrupt
			// signal (for example, SIGSEGV) while fuzzing.
			return fmt.Errorf("fuzzing process hung or terminated unexpectedly: %w", err)