}
      }

      /**
       * Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. Replace with a simple
       * call to Unsafe.getUnsafe when integrating into a jdk.
       *
       * @return a sun.misc.Unsafe
       */
      private static Unsafe getUnsafe() {
        try {
          return Unsafe.getUnsafe();
        } catch (SecurityException e) {

    private static final Unsafe theUnsafe;

    // The offset to the first element in a byte array.
    private static final int BYTE_ARRAY_BASE_OFFSET;

    /**
     * Returns an Unsafe. Suitable for use in a 3rd party package. Replace with a simple call to
     * Unsafe.getUnsafe when integrating into a JDK.
     *
     * @return an Unsafe instance if successful
     */

The compiler can now allocate the backing store for slices on the
stack in more situations, which improves performance. This change has
the potential to amplify the effects of incorrect
[unsafe.Pointer](/pkg/unsafe#Pointer) usage, see for example [issue
73199](/issue/73199). In order to track down these problems, the
[bisect tool](https://pkg.go.dev/golang.org/x/tools/cmd/bisect) can be
used to find the allocation causing trouble using the

    static {
      Unsafe unsafe = null;
      try {
        unsafe = Unsafe.getUnsafe();
      } catch (SecurityException tryReflectionInstead) {
        try {
          unsafe =
              doPrivileged(
                  (PrivilegedExceptionAction<Unsafe>)
                      () -> {
                        Class<Unsafe> k = Unsafe.class;

   * which will prevent us from selecting the {@code UnsafeAtomicHelper} strategy.
   */
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle", "sun.misc.Unsafe"));

  /**
   * This classloader disallows {@link java.lang.invoke.VarHandle}, {@link sun.misc.Unsafe} and

   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst()}.
   */
  public final Optional<@NonNull E> firstMatch(Predicate<? super E> predicate) {
    // Unsafe, but we can't do much about it now.
    return Iterables.<@NonNull E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
  }

  /**

   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst()}.
   */
  public final Optional<@NonNull E> firstMatch(Predicate<? super E> predicate) {
    // Unsafe, but we can't do much about it now.
    return Iterables.<@NonNull E>tryFind((Iterable<@NonNull E>) getDelegate(), predicate);
  }

  /**

func parseDirEnt(buf []byte) (consumed int, name []byte, typ os.FileMode, err error) {
	// golang.org/issue/15653
	dirent := (*syscall.Dirent)(unsafe.Pointer(&buf[0]))
	if v := unsafe.Offsetof(dirent.Reclen) + unsafe.Sizeof(dirent.Reclen); uintptr(len(buf)) < v {
		return consumed, nil, typ, fmt.Errorf("buf size of %d smaller than dirent header size %d", len(buf), v)
	}
	if len(buf) < int(dirent.Reclen) {

   * which will prevent us from selecting the {@code UnsafeAtomicHelper} strategy.
   */
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle", "sun.misc.Unsafe"));

  /**
   * This classloader disallows {@link java.lang.invoke.VarHandle}, {@link sun.misc.Unsafe} and

      ImmutableMap.of(
          '\n', "<newline>",
          '\t', "<tab>",
          '&', "<and>");

  public void testSafeRange() throws IOException {
    // Basic escaping of unsafe chars (wrap them in {,}'s)
    CharEscaper wrappingEscaper =
        new ArrayBasedCharEscaper(NO_REPLACEMENTS, 'A', 'Z') {
          @Override
          protected char[] escapeUnsafe(char c) {