[PULL 08/46] python: Treat None-return of greeting cmd

[Philippe Mathieu-Daudé]

From: Lukáš Doktor <address@hidden>

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>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Wainer dos Santos Moschetta <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Philippe Mathieu-Daudé <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 4b9a362240..f40586eedd 100644
--- a/python/qemu/qmp.py
+++ b/python/qemu/qmp.py
@@ -80,7 +80,7 @@ class QEMUMonitorProtocol:
             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
 
-- 
2.21.1