From 387729e183365a366c48fce7a9abfcaf4ec6ff4e Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 26 May 2015 00:43:58 +0200
Subject: Issue #23840: tokenize.open() now closes the temporary binary file on
 error to fix a resource warning.

---
 Lib/tokenize.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

(limited to 'Lib/tokenize.py')

diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index ed4153cec6..cf18bf9f2d 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -435,11 +435,15 @@ def open(filename):
     detect_encoding().
     """
     buffer = _builtin_open(filename, 'rb')
-    encoding, lines = detect_encoding(buffer.readline)
-    buffer.seek(0)
-    text = TextIOWrapper(buffer, encoding, line_buffering=True)
-    text.mode = 'r'
-    return text
+    try:
+        encoding, lines = detect_encoding(buffer.readline)
+        buffer.seek(0)
+        text = TextIOWrapper(buffer, encoding, line_buffering=True)
+        text.mode = 'r'
+        return text
+    except:
+        buffer.close()
+        raise
 
 
 def tokenize(readline):
-- 
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