  cff_index_get_name( CFF_Index  idx,
                      FT_UInt    element )
  {
    FT_Memory   memory = idx->stream->memory;
    FT_Byte*    bytes;
    FT_ULong    byte_len;
    FT_Error    error;
    FT_String*  name = 0;


    error = cff_index_access_element( idx, element, &bytes, &byte_len );
    if ( error )
      goto Exit;

    if ( !FT_ALLOC( name, byte_len + 1 ) )
    {
      FT_MEM_COPY( name, bytes, byte_len );
      name[byte_len] = 0;
    }
    cff_index_forget_element( idx, &bytes );

  Exit:
    return name;
  }

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