A new call to launch() with a running VM will fall in exception and
consequently call shutdown().

This patch makes launch() to raise an exception when it's called with VM
already running.

Signed-off-by: Amador Pahim <apa...@redhat.com>
---
 scripts/qemu.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/qemu.py b/scripts/qemu.py
index 03e4cc34b7..363f649a7e 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -165,6 +165,9 @@ class QEMUMachine(object):
         Try to launch the VM and make sure we cleanup and expose the
         command line/output in case of exception.
         '''
+        if self.is_running():
+            raise QEMUMachineError('VM already running')
+
         self._iolog = None
         self._qemu_full_args = None
         try:
-- 
2.13.5


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