commit 551ba20e8ea9a4a97cf63f28b47175e084eb63cd
author Antoine Pitrou <solipsis@pitrou.net> Tue Oct 18 16:40:50 2011 +0200
committer Antoine Pitrou <solipsis@pitrou.net> Tue Oct 18 16:40:50 2011 +0200
tree a4b28e975a3e3b7bef76a97e201d1f0631b1b3e6
parent 6bfecd1271b305afcbe3f3f68980f89aa44e1910

Issue #13188: When called without an explicit traceback argument,
generator.throw() now gets the traceback from the passed exception's
`__traceback__` attribute.  Patch by Petri Lehtinen.

Objects/genobject.c

diff --git a/Objects/genobject.c b/Objects/genobject.c
index 01cd44a..49e2ade 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -261,6 +261,11 @@
             val = typ;
             typ = PyExceptionInstance_Class(typ);
             Py_INCREF(typ);
+
+            if (tb == NULL) {
+                /* Returns NULL if there's no traceback */
+                tb = PyException_GetTraceback(val);
+            }
         }
     }
     else {