[Computer-go] Strange GNU Go ladder behavior

Peter Drake drake at lclark.edu
Thu Jun 18 20:40:02 PDT 2015


I applied both of those patches to 3.8 (the "stable" version on
http://www.gnu.org/software/gnugo/), but the problem has not gone away. Is
there a more stable version?


I finally found a file that causes the problem (attached). Specifically:

[drake at broadcast ~]$ gnugo --infile
results/2015/06/19/03:21:15.950/instance17-b1-2015-06-19-03:21:31.287.sgf
Segmentation fault
[drake at broadcast ~]$ gnugo --infile
results/2015/06/19/03:21:15.950/instance17-b1-2015-06-19-03:21:31.287.sgf
--until 10
white (O) move R16

This seems to work fine on GNU Go installed on some different machines.

What to do?


On Thu, Jun 18, 2015 at 4:11 PM, Hiroshi Yamashita <yss at bd.mbn.or.jp> wrote:

> 2) At some point in the ladder, GNU Go quietly dies without responding to
>> the move request.
>>
>
> Could you reproduce that? Do you have sgf?
> GNU Go has some troubles in some compiler and OS.
>
> e.g.
> GNU Go 3.9.1.  gcc 4.1.2, Debian 4.1.1-21, 32bit
> stops following sgf.
>
> I use own patch for GNU Go 3.7.10.
> http://computer-go.org/pipermail/computer-go/2010-November/001813.html
>
> And insert "if ( eye_size >= MAXEYE-2 ) break;" in optics.c, line 1234.
>  /* Create list of eye vertices */
>  for (pos2 = BOARDMIN; pos2 < BOARDMAX; pos2++) {
>    if ( eye_size >= MAXEYE-2 ) break;
>    if (!ON_BOARD(pos2))
>
> Regards,
> Hiroshi Yamashita
>
> -----------------------------------------------------------------
> (;GM[1]SZ[19]
> PB[Aya 7.04b]
> PW[GNU Go 3.7.10]
> DT[2010-11-22]
> RE[W+6.5]KM[6.5]TM[]RU[Chinese]PC[]EV[]GN[]AP[Aya 7.83g]
> ;B[qd];W[dd];B[dp];W[oc];B[pq];W[po];B[ld];W[qq];B[pc];W[pr]
> ;B[qm];W[cn];B[fq];W[bp];B[cq];W[ck];B[dl];W[en];B[fc];W[fe]
> ;B[cl];W[dk];B[ek];W[bq];B[bl];W[om];B[pk];W[cr];B[ee];W[ed]
> ;B[fd];W[ef];B[ge];W[de];B[fg];W[dh];B[dj];W[cj];B[ci];W[di]
> ;B[bj];W[ej];B[ch];W[bk];B[bi];W[ak];B[fo];W[fk];B[nk];W[eb]
> ;B[ec];W[db];B[dc];W[cc];B[el];W[fm];B[ho];W[fb];B[dg];W[eg]
> ;B[oq];W[gd];B[gc];W[hd];B[od];W[or];B[qp];W[pp];B[qr];W[rq]
> ;B[nr];W[nq];B[mq];W[np];B[hc];W[ic];B[id];W[he];B[ib];W[jc]
> ;B[hf];W[ie];B[if];W[je];B[mr];W[jf];B[lf];W[mp];B[kp];W[ig]
> ;B[hb];W[jb];B[lh];W[sn];B[hm];W[fl];B[mm];W[rl];B[ql];W[rj]
> ;B[rk];W[fs];B[os];W[op];B[lp];W[sk];B[qk];W[rh];B[ph];W[sl]
> ;B[hk];W[ji];B[hi];W[qf];B[hg];W[ih];B[hh];W[lj];B[kj];W[nj]
> ;B[ki];W[mk];B[nl];W[of];B[ff];W[gf];B[aj];W[cf];B[fj];W[cg]
> ;B[dr];W[br];B[co];W[bo];B[dn];W[dm];B[do];W[em];B[cm];W[bn]
> ;B[al];W[dj];B[nc];W[ds];B[qg];W[rg];B[qi];W[pf];B[ri];W[si]
> ;B[re];W[rf];B[qj];W[sj];B[gr];W[fh];B[gj];W[gs];B[gg];W[hr]
> ;B[rn];W[ro];B[qo];W[rp];B[so];W[ps];B[sm];W[sf];B[ge];W[ee]
> ;B[qn];W[jj];B[kk];W[gn];B[go];W[kg];B[lg];W[jr];B[er];W[es]
> ;B[iq];W[lb];B[hq];W[ir];B[kr];W[fi];B[mb];W[nm];B[ml];W[mo]
> ;B[nn];W[on];B[mn];W[lo];B[kn];W[jq];B[jp];W[ks];B[gm];W[kq]
> ;B[ls];W[lq];B[lr];W[fr];B[gq];W[hs];B[cp];W[eo];B[ep];W[jk]
> ;B[bg];W[ah];B[la];W[ka];B[kd];W[jl];B[jd];W[ma];B[kc];W[nb]
> ;B[mc];W[kb];B[gf];W[pb];B[ob];W[oa];B[qb];W[oc];B[eh];W[ei]
> ;B[ii];W[jg];B[bf];W[be];B[bc];W[bb];B[cd];W[cb];B[bd];W[ce]
> ;B[ob];W[rd];B[qe];W[oc];B[ia];W[pa];B[qa];W[jn];B[fn];W[am]
> ;B[jo];W[in];B[hn];W[sp];B[io];W[km];B[lk];W[ni];B[lm];W[mj]
> ;B[gb];W[ga];B[nh];W[ln];B[lc];W[la];B[fa];W[ea];B[im];W[jm]
> ;B[ko];W[sn];B[sh];W[gl];B[hl];W[bm];B[ob])
> -----------------------------------------------------------------
>
>
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>



-- 
Peter Drake
https://sites.google.com/a/lclark.edu/drake/
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