Issue #7341: Close the internal file object in the TarFile

constructor in case of an error.

Lib/tarfile.py

@@ -1557,6 +1557,7 @@ class TarFile(object):
         self.inodes = {}        # dictionary caching the inodes of
                                 # archive members already added
 
+        try:
             if self.mode == "r":
                 self.firstmember = None
                 self.firstmember = self.next()
@@ -1578,6 +1579,11 @@ class TarFile(object):
                     buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
                     self.fileobj.write(buf)
                     self.offset += len(buf)
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
 
     def _getposix(self):
         return self.format == USTAR_FORMAT

Misc/NEWS

@@ -440,6 +440,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #7341: Close the internal file object in the TarFile constructor in
+  case of an error.
+
 - Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
   Windows box. Help provided by David Bolen.