gen_fast_manifest: Fix GzipFile() use with empty filename

1 files changed, 3 insertions, 3 deletions

diff --git a/utils/gen_fast_manifest.py b/utils/gen_fast_manifest.py
index 319e89d..6f3a071 100755
--- a/utils/gen_fast_manifest.py
+++ b/utils/gen_fast_manifest.py
@@ -103,9 +103,9 @@ def gen_manifest(top_dir):
 
     manifest_data = b'\n'.join(manifest_entries) + b'\n'
     if not compat_mode:
-        with gzip.GzipFile(os.path.join(top_dir, 'Manifest.gz'), 'wb',
-                           filename='', mtime=0) as f:
-            f.write(manifest_data)
+        with open(os.path.join(top_dir, 'Manifest.gz'), 'wb') as f:
+            with gzip.GzipFile(fileobj=f, mode='wb', filename='', mtime=0) as gzf:
+                gzf.write(manifest_data)
         if had_manifest:
             os.unlink(os.path.join(top_dir, 'Manifest'))
     else: