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libventi: fix segfault in vtgetreq

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Don't call vtlog() when _vtqrecv() returns
nil on queue hangup, as reported on
http://bitbucket.org/rsc/plan9port/issue/102/

R=rsc
http://codereview.appspot.com/6373046
This commit is contained in:
David du Colombier 2012-07-29 18:53:37 -04:00 committed by Russ Cox
parent d2173bb552
commit 4ed8efea38
1 changed files with 2 additions and 1 deletions
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3
src/libventi/server.c
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@ -182,7 +182,8 @@ vtgetreq(VtSrv *srv)
VtReq *r;
r = _vtqrecv(srv->q);
vtlog(VtServerLog, "<font size=-1>%T %s:</font> vtgetreq %F<br>\n", ((VtSconn*)r->sc)->c->addr, &r->tx);
if (r != nil)
vtlog(VtServerLog, "<font size=-1>%T %s:</font> vtgetreq %F<br>\n", ((VtSconn*)r->sc)->c->addr, &r->tx);
return r;
}