memory lead while using Glib regexp

["Xi Yang" <jiandingzhe 163 com>]

Hi, everyone!


I use Glib's regular expression in a cycle, and find a rapid memory consumption increase. Did I forget to 
release anything?


Thanks a lot!


================= code below ======================


GRegex* regex_illumina = g_regex_new(
    "@(.+):(\\d+):(\\d+):(\\d+):(\\d+)#(\\d+)/([12])",
    G_REGEX_OPTIMIZE,
    GRegexMatchFlags(0),
    NULL
);


GRegex* regex_casava_1p8 = g_regex_new(
    "@(.+):(.+):(.+):(\\d+):(\\d+):(\\d+):(\\d+) ([12]):([YN]):\\d+:(\\w*)",
    G_REGEX_OPTIMIZE,
    GRegexMatchFlags(0),
    NULL
);


// inside cycle body
        gchar* tile_str;
        int tile;
        GMatchInfo* what;
        
        // match and fetch something
        if ( g_regex_match(regex_illumina, seq.header.c_str(), GRegexMatchFlags(0), &what) ) {
            tile_str = g_match_info_fetch(what,3);
        }
        else if ( g_regex_match(regex_casava_1p8, seq.header.c_str(), GRegexMatchFlags(0), &what) ) {
            tile_str = g_match_info_fetch(what,5);
        }
        else {
            throw runtime_error("failed to parse header line:\n"+seq.header);
        }


        // parse a number
        if (sscanf(tile_str,"%d",&tile)!=1)
            throw runtime_error("failed to fetch tile from "+seq.header);


        // release match info and fetched string
        g_match_info_free(what);
        g_free(tile_str);
// end of cycle body