# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1479577107 -3600
# Node ID 6f1e5a97277c4d5eb8fd1d31222a1e412b243a08
# Parent  828aa694a1a12397bbfe997604c2475b5b531aa6
Prevent out-of-bounds access to lists.

diff -r 828aa694a1a1 -r 6f1e5a97277c lib/__builtins__/list.py
--- a/lib/__builtins__/list.py	Sat Nov 19 18:30:54 2016 +0100
+++ b/lib/__builtins__/list.py	Sat Nov 19 18:38:27 2016 +0100
@@ -96,7 +96,10 @@
 
     def __get_single_item__(self, index):
 
-        "Return the item at 'index'."
+        "Return the item at the normalised (positive) 'index'."
+
+        if index >= len(self):
+            raise IndexError(index)
 
         return native._list_element(self, index)