Issue #13781: Fix GzipFile to work with os.fdopen()'d file objects.
diff --git a/Lib/gzip.py b/Lib/gzip.py
index 2bcb4db..8fdac83 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -88,8 +88,12 @@
if fileobj is None:
fileobj = self.myfileobj = __builtin__.open(filename, mode or 'rb')
if filename is None:
- if hasattr(fileobj, 'name'): filename = fileobj.name
- else: filename = ''
+ # Issue #13781: os.fdopen() creates a fileobj with a bogus name
+ # attribute. Avoid saving this in the gzip header's filename field.
+ if hasattr(fileobj, 'name') and fileobj.name != '<fdopen>':
+ filename = fileobj.name
+ else:
+ filename = ''
if mode is None:
if hasattr(fileobj, 'mode'): mode = fileobj.mode
else: mode = 'rb'