Comment 1 for bug 938431

I have now reproduced the same segfault without the controlling script by running qemu on the command line and connecting to it with lftp. To reproduce the fault it appears to be necessary to attempt to connect to the guest before it is fully booted and ready to accept connections; if I let it "settle" for a while before attempting to connect then it doesn't crash. Even if I start hammering it as soon as it's launched I can only occasionally trigger the crash, so whatever's breaking is a short-lived state of some kind.

If I make an lftp connection then immediately kill lftp, qemu receives a SIGPIPE. I'm wondering if a sigpipe at the wrong time is messing things up, but it's only the vaguest notion.