Method test_module_with_large_stack

Lib/test/test_import/__init__.py:494–531

(self, module='longlist')

            del sys.path[0]

    def test_module_with_large_stack(self, module='longlist'):
        # Regression test for http://bugs.python.org/issue561858.
        filename = module + '.py'

        # Create a file with a list of 65000 elements.
        with open(filename, 'w', encoding='utf-8') as f:
            f.write('d = [\n')
            for i in range(65000):
                f.write('"",\n')
            f.write(']')

        try:
            # Compile & remove .py file; we only need .pyc.
            # Bytecode must be relocated from the PEP 3147 bytecode-only location.
            make_legacy_pyc(filename, allow_compile=True)
        finally:
            unlink(filename)

        # Need to be able to load from current dir.
        sys.path.append('')
        importlib.invalidate_caches()

        namespace = {}
        try:
            # This used to crash.
            exec('import ' + module, None, namespace)
        finally:
            # Cleanup.
            del sys.path[-1]
            unlink(filename + 'c')
            unlink(filename + 'o')

            # Remove references to the module (unload the module)
            namespace.clear()
            try:
                del sys.modules[module]
            except KeyError:
                pass

    def test_failing_import_sticks(self):
        source = TESTFN + ".py"