Issue2221: in Idle, exec('xx') raised a SystemError('error return without exception set')
instead of the expected NameError
This happens when sys.stdout is redirected to something that cannot flush().
the flush_io() function must be exception-neutral: don't raise, and don't clear exceptions.
Next step: exec() is not supposed to flush sys.stdout...
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 74e3430..3207fb8 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1467,6 +1467,11 @@
flush_io(void)
{
PyObject *f, *r;
+ PyObject *type, *value, *traceback;
+
+ /* Save the current exception */
+ PyErr_Fetch(&type, &value, &traceback);
+
f = PySys_GetObject("stderr");
if (f != NULL) {
r = PyObject_CallMethod(f, "flush", "");
@@ -1483,6 +1488,8 @@
else
PyErr_Clear();
}
+
+ PyErr_Restore(type, value, traceback);
}
static PyObject *