pythongh-117982: Make the test for closed file more safe in the C API tests

serhiy-storchaka · serhiy-storchaka · commit e30956bd3361 · 2024-04-24T16:38:17.000+03:00
The behavior of fileno() after fclose() is undefined, but it is the only
practical way to check whether the file was closed.
Only test this on the known platforms (Linux, Windows, macOS), where we
already tested that it works.
diff --git a/Modules/_testcapi/run.c b/Modules/_testcapi/run.c
@@ -74,8 +74,10 @@ run_fileexflags(PyObject *mod, PyObject *pos_args)
 
     result = PyRun_FileExFlags(fp, filename, start, globals, locals, closeit, pflags);
 
-#if !defined(__wasi__)
-    /* The behavior of fileno() after fclose() is undefined. */
+#if defined(__linux__) || defined(MS_WINDOWS) || defined(__APPLE__)
+    /* The behavior of fileno() after fclose() is undefined, but it is
+     * the only practical way to check whether the file was closed.
+     * Only test this on the known platforms. */
     if (closeit && result && fileno(fp) >= 0) {
         PyErr_SetString(PyExc_AssertionError, "File was not closed after excution");
         Py_DECREF(result);
