commit a6df938fefd5b51d85a45cf3f29f60ee7bb21edf
author Serhiy Storchaka <storchaka@gmail.com> Mon Apr 08 22:35:02 2013 +0300
committer Serhiy Storchaka <storchaka@gmail.com> Mon Apr 08 22:35:02 2013 +0300
tree d2a5dd6baa1c9b84b7f17526513ecbb5d18c2f1a
parent cf86d9441ed09f0b7265a0a869c110f245336228

Close #17666: Fix reading gzip files with an extra field.

Lib/gzip.py

diff --git a/Lib/gzip.py b/Lib/gzip.py
index 8fb1ed0..0adfd3f 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -280,7 +280,8 @@
 
         if flag & FEXTRA:
             # Read & discard the extra field, if present
-            self._read_exact(struct.unpack("<H", self._read_exact(2)))
+            extra_len, = struct.unpack("<H", self._read_exact(2))
+            self._read_exact(extra_len)
         if flag & FNAME:
             # Read and discard a null-terminated string containing the filename
             while True: