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app_manager: Fix a crash in unregister_handler

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This fixes a regression introduced by commit d3f8f4eb.
("RyuApp: delete a key without handlers when unregistering a handler")

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
YAMAMOTO Takashi 2014-06-05 15:13:42 +09:00 committed by FUJITA Tomonori
parent 5be7310ce2
commit ed25eefa84
1 changed files with 2 additions and 2 deletions
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4
ryu/base/app_manager.py
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@ -178,8 +178,8 @@ class RyuApp(object):
def unregister_handler(self, ev_cls, handler):
assert callable(handler)
self.event_handlers[ev_cls].remove(handler)
if not event_handlers[ev_cls]:
del event_handlers[ev_cls]
if not self.event_handlers[ev_cls]:
del self.event_handlers[ev_cls]
def register_observer(self, ev_cls, name, states=None):
states = states or set()