Issue #18408: PyEval_EvalFrameEx() and PyEval_CallObjectWithKeywords() now fail
with an assertion error if they are called with an exception set
(PyErr_Occurred()).
If these functions are called with an exception set, the exception may be
cleared and so the caller looses its exception.
Add also assertions to PyEval_CallObjectWithKeywords() and call_function() to
check if the function succeed with no exception set, or the function failed
with an exception set.
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index ad1aa48..6a885cf 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -663,6 +663,11 @@
_set_BlockingIOError(char *msg, Py_ssize_t written)
{
PyObject *err;
+#ifdef Py_DEBUG
+ /* in debug mode, PyEval_EvalFrameEx() fails with an assertion error
+ if an exception is set when it is called */
+ PyErr_Clear();
+#endif
err = PyObject_CallFunction(PyExc_BlockingIOError, "isn",
errno, msg, written);
if (err)