From 21820cd92503cb7860fb22e61ccb3796f05e3cb6 Mon Sep 17 00:00:00 2001
From: Greg Ward <gward@python.net>
Date: Wed, 7 May 2003 00:55:35 +0000
Subject: [PATCH] SF #726446: raise ValueError if width <= 0.

---
 Lib/textwrap.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/textwrap.py b/Lib/textwrap.py
index 03fcbc053e9..fdb95d71637 100644
--- a/Lib/textwrap.py
+++ b/Lib/textwrap.py
@@ -197,6 +197,8 @@ class TextWrapper:
         lines, but apart from that whitespace is preserved.
         """
         lines = []
+        if self.width <= 0:
+            raise ValueError("invalid width %r (must be > 0)" % self.width)
 
         while chunks: