code: def test(self):
      e1 = compiler.CompileException(
          "msg", "fn.cu", "fn", ("-ftz=true",)
      )
      e2 = pickle.loads(pickle.dumps(e1))
      assert e1.args == e2.args
      assert str(e1) == str(e2)
  
imports: import pickle
  import unittest
  from unittest import mock
  import cupy
  from cupy.cuda import compiler
label_desc: Use image node_id 1 for calling the TestExceptionPicklable obj's underlying member method code with example usage: obj.test() without return types