Raise error as exception and reformat code with black

mythril/laser/ethereum/call.py

@@ -124,7 +124,7 @@ def get_callee_account(global_state, callee_address, dynamic_loader):
         code = dynamic_loader.dynld(environment.active_account.address, callee_address)
     except ValueError as error:
         logging.debug("Unable to execute dynamic loader because: {}".format(str(error)))
-        raise ValueError(str(error))
+        raise error
     if code is None:
         logging.debug("No code returned, not a contract account?")
         raise ValueError()

mythril/laser/ethereum/state.py

@@ -100,9 +100,7 @@ class Calldata:
                 if stop is None:
                     stop = self.calldatasize
                 current_index = (
-                    start
+                    start if isinstance(start, BitVecRef) else BitVecVal(start, 256)
-                    if isinstance(start, BitVecRef)
-                    else BitVecVal(start, 256)
                 )
                 dataparts = []
                 while simplify(current_index != stop):

mythril/laser/ethereum/util.py

@@ -89,7 +89,9 @@ def get_concrete_int(item):
 
 
 def concrete_int_from_bytes(_bytes, start_index):
-    _bytes = [_byte.as_long() if type(_byte) == BitVecNumRef else _byte for _byte in _bytes]
+    _bytes = [
+        _byte.as_long() if type(_byte) == BitVecNumRef else _byte for _byte in _bytes
+    ]
     b = _bytes[start_index : start_index + 32]
     val = int.from_bytes(b, byteorder="big")