Fix bug #1565514, SystemError not raised on too many nested blocks.
It seems like this should be a different error than SystemError, but
I don't have any great ideas and SystemError was raised in 2.4 and earlier.
Will backport.
diff --git a/Misc/NEWS b/Misc/NEWS
index 05930e9..fa287ea 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
Core and builtins
-----------------
+- Bug #1565514, SystemError not raised on too many nested blocks.
+
- Bug #1576174: WindowsError now displays the windows error code
again, no longer the posix error code.