commit d9106434f77fa84c8a59f8e60dc9c14cdd989b35
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Fri Aug 07 20:24:12 2020 -0700
committer GitHub <noreply@github.com> Fri Aug 07 20:24:12 2020 -0700
tree 2b839cc6f69b99fdca0c689be6bb00cf5fb1bb4d
parent deea701b7f9922e0991b129e84644c2d6b0995ae

bpo-41497: Fix potential UnicodeDecodeError in dis CLI (GH-21757)

(cherry picked from commit a4084b9d1e40c1c9259372263d1fe8c8a562b093)

Co-authored-by: Konge <zkonge@outlook.com>

Lib/dis.py

diff --git a/Lib/dis.py b/Lib/dis.py
index 10e5f7f..e289e17 100644
--- a/Lib/dis.py
+++ b/Lib/dis.py
@@ -542,7 +542,7 @@
     import argparse
 
     parser = argparse.ArgumentParser()
-    parser.add_argument('infile', type=argparse.FileType(), nargs='?', default='-')
+    parser.add_argument('infile', type=argparse.FileType('rb'), nargs='?', default='-')
     args = parser.parse_args()
     with args.infile as infile:
         source = infile.read()