If I get the last two comments right, the problem was only about the Ubuntu PPA package, so I'm closing this for upstream QEMU, too. If you still have problems with upstream QEMU here, please feel free to open the ticket again.
** Changed in: qemu Status: New => Invalid -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1285505 Title: [ppa 2.0~git-20140225] SIGABRT with -virtfs Status in QEMU: Invalid Status in qemu package in Ubuntu: Fix Released Bug description: As requested on u-devel@, I tested QEMU 2.0~git-20140225.aa0d1f4-0ubuntu2 from ppa:ubuntu-virt/candidate. This has a regression with virtfs. I created a simple cloud-image based VM with autopkgtest: $ sudo apt-get install autopkgtest $ adt-buildvm-ubuntu-cloud This part works fine with the new QEMU (it already boots the cloud- image in qemu and runs cloud-init). But running it with a shared 9p directory crashes: $ mkdir -p /tmp/shared $ qemu-system-x86_64 -enable-kvm -m 1024 -nographic -virtfs local,id=autopkgtest,path=/tmp/shared,security_model=none,mount_tag=myshare -snapshot adt-trusty-amd64-cloud.img ** ERROR:/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c:331:object_initialize_with_type: assertion failed: (type != NULL) Abgebrochen (Speicherabzug geschrieben) It should be easy enough to reproduce and the assertion message already should be clear, but this is the intersting part of the (unretraced) stack trace: #2 0x00007fe3329a9195 in g_assertion_message (domain=domain@entry=0x0, file=file@entry=0x7fe334c5a8e8 "/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c", line=line@entry=331, func=func@entry=0x7fe334c5ac40 "object_initialize_with_type", message=message@entry=0x7fe336e06e40 "assertion failed: (type != NULL)") at /build/buildd/glib2.0-2.39.90/./glib/gtestutils.c:2291 lstr = "331\000\377\177\000\000\320ޠF\377\177\000\000\220\026\321\066\343\177\000\000R\252\305\064\343\177\000" s = 0x7fe336e06e70 "pp\340\066\343\177" #3 0x00007fe3329a922a in g_assertion_message_expr (domain=0x0, file=0x7fe334c5a8e8 "/build/buildd/qemu-2.0~git-20140225.aa0d1f4/qom/object.c", line=331, func=0x7fe334c5ac40 "object_initialize_with_type", expr=<optimized out>) at /build/buildd/glib2.0-2.39.90/./glib/gtestutils.c:2306 s = 0x7fe336e06e40 "assertion failed: (type != NULL)" To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1285505/+subscriptions