inline size_t SearchBuffer::append(const UChar* characters, size_t length)
{
    ASSERT(length);
    if (!(m_options & CaseInsensitive)) {
        append(characters[0], true);
        return 1;
    }
    const int maxFoldedCharacters = 16; // sensible maximum is 3, this should be more than enough
    UChar foldedCharacters[maxFoldedCharacters];
    bool error;
    int numFoldedCharacters = foldCase(foldedCharacters, maxFoldedCharacters, characters, 1, &error);
    ASSERT(!error);
    ASSERT(numFoldedCharacters);
    ASSERT(numFoldedCharacters <= maxFoldedCharacters);
    if (!error && numFoldedCharacters) {
        numFoldedCharacters = min(numFoldedCharacters, maxFoldedCharacters);
        append(foldedCharacters[0], true);
        for (int i = 1; i < numFoldedCharacters; ++i)
            append(foldedCharacters[i], false);
    }
    return 1;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.