Re: [gnugo-devel] improving bug reports

[Gunnar Farnebäck]

I wrote:
> The patch below removes all board output except at the top of the
> stack and writes an sgf of the game up to the bottom of the stack.

A sample assertion failure (artificially provoked) may look like this
after the patch:

***assertion failure:
reading.c:361 - stackp < 20 near PASS***

W:O7 B:O8 W:N7 B:M7 W:N6 B:P6 W:P7 B:M9 W:N8 B:O5 W:N9 B:O10 W:N5 B:M10 W:N4 
B:O3 W:N3 B:N2 W:P2 B:P5 
   A B C D E F G H J K L M N O P Q R S T
19 . . . . . . . . . . . . . . . . . . . 19
18 O O O O O . . . O X X . . . . . . . . 18
17 O X X . X O O . O O X . . X . . . . . 17
16 X X . X . X X . . O X . . X X X X . . 16
15 . . . . . . . . O X O X X O O . O X . 15
14 . . . X X O . . . X O O X . . O O X . 14
13 . . . . . . . O . X O . O O O O X . . 13
12 X X . X X O . . . O O . O O X X X . . 12
11 O . X X O O . . . . O O X X X O . X X 11     WHITE (O) has captured 4 stones
10 O X . X X X O . . + . X X X X O X X O 10     BLACK (X) has captured 1 stones
 9 . O . . O X O . . . O X O X O . O O O 9
 8 O O O O . O . . . O . X O X O . . . . 8
 7 X X X . . . . . . . O X O O O . . O . 7
 6 . . . X . O O . . . O X O X X O O . O 6
 5 . . . . X X O . . O X X O X X O X O . 5
 4 . X . X . X X . O O X . O . X X X X . 4
 3 . . X O O O X O O X . X O X . O X . . 3
 2 X X O O . X O X O X . X X . O . X . . 2
 1 . O . . . . O . O O X . . . . . . . . 1
   A B C D E F G H J K L M N O P Q R S T
(;GM[1]FF[4]SZ[19]KM[0.5]GN[GNU Go 3.5.8 stepped on a bug]
AB[dd][pd][dp]
;W[pq];B[pp];W[fq];B[dn];W[dr];B[cq];W[iq];B[qq];W[qp];B[qr];W[po];B[op]
;W[pf];B[qo];W[qn];B[rp];W[pn];B[rn];W[qk];B[lq];W[fc];B[df];W[db];B[cc]
;W[ic];B[nc];W[cl];B[cm];W[dl];B[bm];W[qe];B[qd];W[cb];B[kc];W[ok];B[oh]
;W[ng];B[qg];W[pg];B[re];W[og];B[qh];W[cr];B[br];W[bl];B[ci];W[fl];B[ph]
;W[rm];B[rj];W[fn];B[eo];W[nh];B[ni];W[rk];B[qj];W[pj];B[oj];W[kg];B[jr]
;W[ir];B[jq];W[bb];B[bc];W[ki];B[mj];W[ai];B[bh];W[js];B[ks];W[is];B[lr]
;W[ac];B[ad];W[ab];B[bd];W[jo];B[ah];W[jl];B[ak];W[ei];B[dh];W[ff];B[je]
;W[ie];B[jf];W[hg];B[jg];W[jh];B[jb];W[ib];B[ko];W[al];B[am];W[aj];B[bj]
;W[sj];B[si];W[sk];B[ri];W[bs];B[ar];W[sn];B[nk];W[ro];B[qp];W[ol];B[nn]
;W[kn];B[lo];W[ip];B[eh];W[fh];B[ej];W[fi];B[dj];W[bk];B[fj];W[gj];B[ec]
;W[eb];B[fd];W[gc];B[gd];W[qf];B[rf];W[ne];B[lh];W[li];B[lg];W[lf];B[mf]
;W[kh];B[le];W[kf];B[me];W[mg];B[nd];W[ke];B[kd];W[jd];B[ln];W[km];B[ll]
;W[jc];B[kb];W[oe];B[mi];W[mh];B[od];W[kk];B[fo];W[gn];B[gp];W[go];B[fp]
;W[dq];B[gq];W[gr];B[fr];W[eq];B[hr];W[gs];B[bp];W[pi];B[oi];W[hq];B[fk]
;W[gk];B[ef];W[ek];B[di];W[jp];B[kp]
)
gnugo 3.5.8 (seed 1086724294): You stepped on a bug.
Please mail this message, including the debug output above, to address@hidden

/Gunnar