From 508edf5cc52aadc5c212a9e9da467679709bf561 Mon Sep 17 00:00:00 2001
From: Julien Duponchelle <julien@gns3.net>
Date: Mon, 12 Dec 2016 09:16:29 +0100
Subject: [PATCH] Fix a rare crash when stopping qemu

Fix #821
---
 gns3server/compute/qemu/qemu_vm.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/gns3server/compute/qemu/qemu_vm.py b/gns3server/compute/qemu/qemu_vm.py
index f93488aa..735a380f 100644
--- a/gns3server/compute/qemu/qemu_vm.py
+++ b/gns3server/compute/qemu/qemu_vm.py
@@ -972,12 +972,13 @@ class QemuVM(BaseNode):
                 except ProcessLookupError:
                     pass
                 except asyncio.TimeoutError:
-                    try:
-                        self._process.kill()
-                    except ProcessLookupError:
-                        pass
-                    if self._process.returncode is None:
-                        log.warn('QEMU VM "{}" PID={} is still running'.format(self._name, self._process.pid))
+                    if self._process:
+                        try:
+                            self._process.kill()
+                        except ProcessLookupError:
+                            pass
+                        if self._process.returncode is None:
+                            log.warn('QEMU VM "{}" PID={} is still running'.format(self._name, self._process.pid))
             self._process = None
             self._stop_cpulimit()
             yield from super().stop()