# Buggy code
def crypted_transfer_decode_dictentry(self, load, dictkey=None, tries=3, timeout=60):
    if not self.auth.authenticated:
        # Return controle back to the caller, continue when authentication succeeds
        yield self.auth.authenticate()
    # Return control to the caller. When send() completes, resume by populating ret with the Future.result
    ret = yield self.message_client.send(
        self._package_load(self.auth.crypticle.dumps(load)),
        timeout=timeout,
        tries=tries,
    )
    key = self.auth.get_keys()
    cipher = PKCS1_OAEP.new(key)
    aes = cipher.decrypt(ret["key"])
    pcrypt = salt.crypt.Crypticle(self.opts, aes)
    raise tornado.gen.Return(pcrypt.loads(ret[dictkey]))


# Traceback (IOError)
2015-12-13 06:53:53,199 [salt.master      ][ERROR   ][17378] Error in function _mine:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1379, in run_func
ret = getattr(self, func)(load)
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1007, in _mine
load = self.__verify_load(load, ('id', 'data', 'tok'))
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 924, in __verify_load
if not self.__verify_minion(load['id'], load['tok']):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 824, in __verify_minion
with salt.utils.fopen(pub_path, 'r') as fp_:
File "/usr/lib/python2.7/dist-packages/salt/utils/__init__.py", line 1204, in fopen
fhandle = open(*args, **kwargs)
IOError: [Errno 2] No such file or directory: '/etc/salt/pki/master/minions/ause1-encoder546'
2015-12-13 06:54:25,104 [salt.transport.zeromq][ERROR   ][17378] Bad load from minion
2015-12-13 06:54:35,228 [salt.transport.zeromq][ERROR   ][17370] Bad load from minion
2015-12-13 06:54:46,744 [salt.transport.zeromq][ERROR   ][17398] Bad load from minion
2015-12-13 06:54:53,352 [salt.master      ][ERROR   ][17317] Error in function _mine:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1379, in run_func
ret = getattr(self, func)(load)
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1007, in _mine
load = self.__verify_load(load, ('id', 'data', 'tok'))
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 924, in __verify_load
if not self.__verify_minion(load['id'], load['tok']):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 824, in __verify_minion
with salt.utils.fopen(pub_path, 'r') as fp_:
File "/usr/lib/python2.7/dist-packages/salt/utils/__init__.py", line 1204, in fopen
fhandle = open(*args, **kwargs)
IOError: [Errno 2] No such file or directory: '/etc/salt/pki/master/minions/ause1-encoder546'
2015-12-13 06:55:00,814 [salt.master      ][ERROR   ][17343] Error in function _mine:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1379, in run_func
ret = getattr(self, func)(load)
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1007, in _mine
load = self.__verify_load(load, ('id', 'data', 'tok'))
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 924, in __verify_load
if not self.__verify_minion(load['id'], load['tok']):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 824, in __verify_minion
with salt.utils.fopen(pub_path, 'r') as fp_:
File "/usr/lib/python2.7/dist-packages/salt/utils/__init__.py", line 1204, in fopen
fhandle = open(*args, **kwargs)
IOError: [Errno 2] No such file or directory: '/etc/salt/pki/master/minions/ause1-encoder646'
2015-12-13 06:55:17,444 [salt.master      ][ERROR   ][17443] Error in function _mine:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1379, in run_func
ret = getattr(self, func)(load)
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 1007, in _mine
load = self.__verify_load(load, ('id', 'data', 'tok'))
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 924, in __verify_load
if not self.__verify_minion(load['id'], load['tok']):
File "/usr/lib/python2.7/dist-packages/salt/master.py", line 824, in __verify_minion
with salt.utils.fopen(pub_path, 'r') as fp_:
File "/usr/lib/python2.7/dist-packages/salt/utils/__init__.py", line 1204, in fopen
fhandle = open(*args, **kwargs)
IOError: [Errno 2] No such file or directory: '/etc/salt/pki/master/minions/ause1-encoder66'

# Fixed code
def crypted_transfer_decode_dictentry(self, load, dictkey=None, tries=3, timeout=60):
    if not self.auth.authenticated:
        # Return controle back to the caller, continue when authentication succeeds
        yield self.auth.authenticate()
    # Return control to the caller. When send() completes, resume by populating ret with the Future.result
    ret = yield self.message_client.send(
        self._package_load(self.auth.crypticle.dumps(load)),
        timeout=timeout,
        tries=tries,
    )
    key = self.auth.get_keys()
    cipher = PKCS1_OAEP.new(key)
    if "key" not in ret:
        # Reauth in the case our key is deleted on the master side.
        yield self.auth.authenticate()
        ret = yield self.message_client.send(
            self._package_load(self.auth.crypticle.dumps(load)),
            timeout=timeout,
            tries=tries,
        )
    aes = cipher.decrypt(ret["key"])
    pcrypt = salt.crypt.Crypticle(self.opts, aes)
    raise tornado.gen.Return(pcrypt.loads(ret[dictkey]))