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[PATCH] python: Treat None-return of greeting cmd

From: Lukáš Doktor
Subject: [PATCH] python: Treat None-return of greeting cmd
Date: Mon, 20 Jan 2020 08:12:02 +0100

In case qemu process dies the "monitor.cmd" returns None which gets
passed to the "__negotiate_capabilities" and leads to unhandled
exception. Let's only check the resp in case it has a value.

Signed-off-by: Lukáš Doktor <address@hidden>
 python/qemu/qmp.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/qemu/qmp.py b/python/qemu/qmp.py
index 5c8cf6a056..a3e5de718a 100644
--- a/python/qemu/qmp.py
+++ b/python/qemu/qmp.py
@@ -73,7 +73,7 @@ class QEMUMonitorProtocol(object):
             raise QMPConnectError
         # Greeting seems ok, negotiate capabilities
         resp = self.cmd('qmp_capabilities')
-        if "return" in resp:
+        if resp and "return" in resp:
             return greeting
         raise QMPCapabilitiesError

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