Issue #1028: Tk returns invalid Unicode null in %A: UnicodeDecodeError.
With Tk < 8.5 _tkinter.c:PythonCmd() raised UnicodeDecodeError, caused IDLE to
exit. Converted to valid Unicode null in PythonCmd().
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 8552575..438955e 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -2023,7 +2023,19 @@
for (i = 0; i < (argc - 1); i++) {
PyObject *s = PyUnicode_FromString(argv[i + 1]);
- if (!s || PyTuple_SetItem(arg, i, s)) {
+ if (!s) {
+ /* Is Tk leaking 0xC080 in %A - a "modified" utf-8 null? */
+ if (PyErr_ExceptionMatches(PyExc_UnicodeDecodeError) &&
+ !strcmp(argv[i + 1], "\xC0\x80")) {
+ PyErr_Clear();
+ /* Convert to "strict" utf-8 null */
+ s = PyUnicode_FromString("\0");
+ } else {
+ Py_DECREF(arg);
+ return PythonCmd_Error(interp);
+ }
+ }
+ if (PyTuple_SetItem(arg, i, s)) {
Py_DECREF(arg);
return PythonCmd_Error(interp);
}