Assertion failure at Python/instruction_sequence.c:121: `int _PyInstructionSequence_Addop(instr_sequence *, int, int, location): Assertion 'OPCODE_HAS_ARG(opcode) || HAS_TARGET(opcode) || oparg == 0' failed`

Crash report

What happened?

import unittest
from test.support.bytecode_helper import CodegenTestCase
class IsolatedCodeGenTests(CodegenTestCase):
    def assertInstructionsMatch_recursive(self, insts, expected_insts):
        self.assertInstructionsMatch(insts, expected_insts)
    def codegen_test(self, snippet, expected_insts):
        import ast
        a = ast.parse(snippet, 'my_file.py', 'exec')
        insts = self.generate_code(a)
        self.assertInstructionsMatch_recursive(insts, expected_insts)
    def test_if_expression(self):
        snippet = '42 if True else 24'
        expected = [('RESUME', 0, 0), ('ANNOTATIONS_PLACEHOLDER', None), ('LOAD_CONST', 0, 1), ('TO_BOOL', 256, 1), ('POP_JUMP_IF_FALSE', (false_lbl := 1), 1), ('LOAD_CONST', 1, 1), ('\x00', (exit_lbl := self.Label())), false_lbl, ('', 255, 1), exit_lbl, ('POP_TOP', None), ('LOAD_CONST', 1), ('RETURN_VALUE', None)]
        self.codegen_test(snippet, expected)

if __name__ == "__main__":
    unittest.main(verbosity=0)

python: ../Python/instruction_sequence.c:121: int _PyInstructionSequence_Addop(instr_sequence *, int, int, location): Assertion `OPCODE_HAS_ARG(opcode) || HAS_TARGET(opcode) || oparg == 0' failed.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

No response

Commencez par l’assertion à Python/instruction_sequence.c:121 et reproduisez-la à l’aide de l’extrait IsolatedCodeGenTests fourni via CodegenTestCase.generate_code(). Suivez les instructions générées pour l’expression conditionnelle et déterminez pourquoi l’assertion est atteinte avec l’opcode et l’argument signalés. La tâche est terminée lorsque le reproducer n’abandonne plus et qu’un test de régression couvre le cas.