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-rw-r--r--Lib/textwrap.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/textwrap.py b/Lib/textwrap.py
index 03fcbc0..fdb95d7 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: