[gnugo-devel] bug: segfault under normal play

[William Chargin]

Hello good GNU Go developers,

I get a segfault when playing C5 from the following SGF file (also attached):

(;GM[1]FF[4]AP[qGo:2.0.0]ST[1]

SZ[19]HA[0]KM[0]PW[Computer]PB[Human]

;B[oe];W[dd];B[dp];W[qq];B[jp];W[cn];B[mj];W[ck];B[gf];W[oc]

;B[pe];W[qd];B[re];W[rd];B[se];W[fq];B[fp];W[gp];B[ep];W[hq]

;B[hp];W[go];B[gn];W[fo];B[eo];W[lq];B[iq];W[hr];B[fr];W[eq]

;B[dq];W[er];B[es];W[dr];B[cr];W[ds];B[cs];W[gq];B[ir];W[lc]

;B[fm];W[lo];B[fs];W[ho];B[io];W[hn];B[hm];W[in];B[jn];W[im]

;B[il];W[ip];B[jo];W[mn];B[gs];W[jq];B[is];W[kq];B[hs];W[hp]

;B[fn];W[jm];B[km];W[jl];B[jk];W[kl];B[ll];W[kk];B[kj];W[lk]

;B[mk];W[ik];B[gr];W[jj];B[hl];W[nl];B[lj];W[jk];B[ij];W[ji]

;B[hj];W[qk];B[jh];W[qe];B[ki];W[ml];B[lm];W[ii];B[hi];W[ih]

;B[ig];W[jg];B[kh];W[hk];B[gk];W[hh];B[gh];W[hg];B[hf];W[if]

;B[gg];W[ig];B[ie];W[ch];B[jf];W[kg];B[lg];W[kf];B[ke];W[lf]

;B[le];W[mf];B[mg];W[gj];B[gi];W[gl];B[gm];W[fk];B[ek];W[df]

;B[fj];W[rf];B[ej];W[gk];B[je];W[nf];B[ng];W[el];B[me];W[em]

;B[en];W[cp];B[of];W[ne];B[nd];W[fl];B[dl];W[dm];B[cm];W[dn]

)

Entering load segfault.sgf and then C5 causes GNU Go is thinking... to appear for a few seconds, then Segmentation fault.

This is GNU Go 3.8, as provided by apt install gnugo on the Linux Mint 17.3 repositories. (The repository lists it as 3.8-7, if that helps.) I'm running with standard settings: 19×19 board, handicap 0, no komi.

Playing the sequence Black C8, White B9, Black C5, White C3, Black B6 also causes a segmentation fault. So does Black B7, White C3, Black C5, White B6, Black B5. I hope GNU Go is not being a bad sport! :)

Happy to help if you're having trouble reproducing or anything. Let me know what I can do.

Best,

WC

segfault.sgf
Description: application/go-sgf