input: Write a function to detect if a given Python function contains any potential errors related to modifying a list while iterating over it. The function should return True if an error is detected, otherwise return False. If the function is empty or has no relevant code, it should return False.
  assert detect_error_in_function("def expand_list(list):\n    for item in list:\n        list *= 2")==True
  assert detect_error_in_function("def expand_list(list):\n    list_copy = list[:]\n    for item in list_copy:\n        list *= 2")==False
  assert detect_error_in_function("def empty_function():\n    pass")==False
  assert detect_error_in_function("")==False
  assert detect_error_in_function("def meaningless_function():\n    x = 1 + 1")==False
output: def detect_error_in_function(func_str):
      if not func_str or "for" not in func_str or "in" not in func_str:
          return False
      lines = func_str.split("\n")
      for i in range(len(lines)):
          if "for" in lines[i] and "in" in lines[i]:
              list_var = lines[i].split("in")[1].strip().split()[0]
              for j in range(i + 1, len(lines)):
                  if list_var in lines[j] and ("*=" in lines[j] or "+=" in lines[j] or "-=" in lines[j] or "/=" in lines[j]):
                      return True
      return False