From: Nikita Sobolev <mail@sobolevn.me>
Date: Thu, 27 Jan 2022 11:55:58 +0000 (+0300)
Subject: bpo-46544: Do not leak `x` and `uspace` in textwrap.TextWrapper (GH-30955)
X-Git-Tag: v3.11.0a5~73
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=82bce54614f8116a40454fbbbf96a3fd460ca7df;p=thirdparty%2FPython%2Fcpython.git

bpo-46544: Do not leak `x` and `uspace` in textwrap.TextWrapper (GH-30955)
---

diff --git a/Lib/textwrap.py b/Lib/textwrap.py
index 841de9baecf5..98bedd27ea3a 100644
--- a/Lib/textwrap.py
+++ b/Lib/textwrap.py
@@ -63,10 +63,7 @@ class TextWrapper:
         Append to the last line of truncated text.
     """
 
-    unicode_whitespace_trans = {}
-    uspace = ord(' ')
-    for x in _whitespace:
-        unicode_whitespace_trans[ord(x)] = uspace
+    unicode_whitespace_trans = dict.fromkeys(map(ord, _whitespace), ord(' '))
 
     # This funky little regex is just the trick for splitting
     # text up into word-wrappable chunks.  E.g.
diff --git a/Misc/NEWS.d/next/Library/2022-01-27-13-30-02.bpo-46544.oFDVWj.rst b/Misc/NEWS.d/next/Library/2022-01-27-13-30-02.bpo-46544.oFDVWj.rst
new file mode 100644
index 000000000000..63b47e55f1b1
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-01-27-13-30-02.bpo-46544.oFDVWj.rst
@@ -0,0 +1,2 @@
+Don't leak ``x`` & ``uspace`` intermediate vars in
+:class:`textwrap.TextWrapper`.