bpo-36829: Add _PyErr_WriteUnraisableMsg() (GH-13488)

* sys.unraisablehook: add 'err_msg' field to UnraisableHookArgs.
* Use _PyErr_WriteUnraisableMsg() in _ctypes _DictRemover_call()
  and gc delete_garbage().

1 files changed, 5 insertions, 4 deletions

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 5ebeacf0b7..08a1a2995e 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -689,14 +689,15 @@ Handle an unraisable exception.
 The unraisable argument has the following attributes:
 
 * exc_type: Exception type.
-* exc_value: Exception value.
-* exc_tb: Exception traceback, can be None.
-* obj: Object causing the exception, can be None.
+* exc_value: Exception value, can be None.
+* exc_traceback: Exception traceback, can be None.
+* err_msg: Error message, can be None.
+* object: Object causing the exception, can be None.
 [clinic start generated code]*/
 
 static PyObject *
 sys_unraisablehook(PyObject *module, PyObject *unraisable)
-/*[clinic end generated code: output=bb92838b32abaa14 input=fdbdb47fdd0bee06]*/
+/*[clinic end generated code: output=bb92838b32abaa14 input=ec3af148294af8d3]*/
 {
     return _PyErr_WriteUnraisableDefaultHook(unraisable);
 }