int ssl3_do_compress(SSL *ssl, SSL3_RECORD *wr)
{
#ifndef OPENSSL_NO_COMP
    int i;

    i = COMP_compress_block(ssl->compress, wr->data,
                            SSL3_RT_MAX_COMPRESSED_LENGTH,
                            wr->input, (int)wr->length);
    if (i < 0)
        return (0);
    else
        wr->length = i;

    wr->input = wr->data;
#endif
    return (1);
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.