gh-96678: Avoid undefined behaviour in test (GH-96672) (#96795)

miss-islington · matthiasgoergens · web-flow · commit cc8b006ae314 · 2022-09-13T16:04:00.000+01:00
(cherry picked from commit 6ba686d) Co-authored-by: Matthias Görgens <matthias.goergens@gmail.com> Co-authored-by: Matthias Görgens <matthias.goergens@gmail.com>
diff --git a/Programs/_testembed.c b/Programs/_testembed.c
@@ -1581,7 +1581,7 @@ static int test_init_is_python_build(void)
     config._is_python_build = INT_MAX;
     env = getenv("NEGATIVE_ISPYTHONBUILD");
     if (env && strcmp(env, "0") != 0) {
-        config._is_python_build++;
+        config._is_python_build = INT_MIN;
     }
     init_from_config_clear(&config);
     Py_Finalize();

Original file line number	Diff line number	Diff line change
`@@ -1581,7 +1581,7 @@ static int test_init_is_python_build(void)`
`1581`	`1581`	`config._is_python_build = INT_MAX;`
`1582`	`1582`	`env = getenv("NEGATIVE_ISPYTHONBUILD");`
`1583`	`1583`	`if (env && strcmp(env, "0") != 0) {`
`1584`		`- config._is_python_build++;`
	`1584`	`+ config._is_python_build = INT_MIN;`
`1585`	`1585`	`}`
`1586`	`1586`	`init_from_config_clear(&config);`
`1587`	`1587`	`Py_Finalize();`