commit e53fcfd7d32343bd1a5780a85ed9bfde0c8f79b6
author Nick Coghlan <ncoghlan@gmail.com> Wed Nov 07 12:26:40 2007 +0000
committer Nick Coghlan <ncoghlan@gmail.com> Wed Nov 07 12:26:40 2007 +0000
tree 7c2f3fc31aad51e8a1450d79774229853bd5bdba
parent 2e49f781cb299bb1c832b663dc50d7d4fad67321

Fix issue #1705170 (backport from trunk)

Lib/contextlib.py

diff --git a/Lib/contextlib.py b/Lib/contextlib.py
index a807c42..c4fab1b 100644
--- a/Lib/contextlib.py
+++ b/Lib/contextlib.py
@@ -25,6 +25,10 @@
             else:
                 raise RuntimeError("generator didn't stop")
         else:
+            if value is None:
+                # Need to force instantiation so we can reliably
+                # tell if we get the same exception back
+                value = type()
             try:
                 self.gen.throw(type, value, traceback)
                 raise RuntimeError("generator didn't stop after throw()")