code: def test_function_in_suite(self):
      def f(_):
          pass
  
      suite = unittest.TestSuite()
      suite.addTest(f)
  
      # when the bug is fixed this line will not crash
      suite.run(unittest.TestResult())
  
imports: import unittest
  import gc
  import sys
  import weakref
  from test.test_unittest.support import LoggingResult, TestEquality
label_desc: Use image node_id 20 for calling the Test_TestSuite obj's underlying member method code with example usage: obj.test_function_in_suite() without return types