input: Write a function to detect potential errors in the given Python function and suggest corrections. The function should return a modified version of the input function with the identified errors fixed. The input function attempts to modify a list while iterating over it, which can lead to unexpected behavior. 
  
  def fix_iteration_error(func):
      import inspect
      source = inspect.getsource(func)
      corrected_source = source.replace('for item in list:', 'for item in list_copy:')
      exec_globals = {}
      exec(corrected_source, exec_globals)
      corrected_func = exec_globals[func.__name__]
      return corrected_func
  
  assert inspect.getsource(fix_iteration_error(expand_list)).strip() == """
  def expand_list(list):
      list_copy = list[:]   # make a copy of the list
      for item in list_copy:
          list *= 2
  """.strip()
output: def fix_iteration_error(func):
      import inspect
      source = inspect.getsource(func)
      corrected_source = source.replace('for item in list:', 'for item in list_copy:')
      exec_globals = {}
      exec(corrected_source, exec_globals)
      corrected_func = exec_globals[func.__name__]
      return corrected_func