Exception handling fix

mythril/laser/ethereum/call.py

@@ -123,8 +123,8 @@ def get_callee_account(global_state, callee_address, dynamic_loader):
     try:
         code = dynamic_loader.dynld(environment.active_account.address, callee_address)
     except ValueError as error:
-        logging.debug("Unable to execute dynamic loader because: {}".format(error.message))
-        raise ValueError(error.message)
+        logging.debug("Unable to execute dynamic loader because: {}".format(str(error)))
+        raise ValueError(str(error))
     if code is None:
         logging.debug("No code returned, not a contract account?")
         raise ValueError()

mythril/laser/ethereum/instructions.py

@@ -701,8 +701,8 @@ class Instruction:
 
         try:
             code = self.dynamic_loader.dynld(environment.active_account.address, addr)
-        except ValueError as e:
-            logging.info("error accessing contract storage due to: " + str(e.message))
+        except (ValueError, AttributeError) as e:
+            logging.info("error accessing contract storage due to: " + str(e))
             state.stack.append(global_state.new_bitvec("extcodesize_" + str(addr), 256))
             return [global_state]