From 267aa24365b9fe6b142be49a2db2219f14c456b7 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@haypocalc.com>
Date: Sun, 2 Oct 2011 01:08:37 +0200
Subject: PyUnicode_FindChar() raises a IndexError on invalid index

---
 Objects/unicodeobject.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index c0511ddc..ab77b03 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8089,6 +8089,10 @@ PyUnicode_FindChar(PyObject *str, Py_UCS4 ch,
     int kind;
     if (PyUnicode_READY(str) == -1)
         return -2;
+    if (start < 0 || end < 0) {
+        PyErr_SetString(PyExc_IndexError, "string index out of range");
+        return -2;
+    }
     if (end > PyUnicode_GET_LENGTH(str))
         end = PyUnicode_GET_LENGTH(str);
     kind = PyUnicode_KIND(str);
-- 
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