Always close download connection

Author: Zac-HD

hypothesis-python/RELEASE.rst

@@ -0,0 +1,4 @@
+RELEASE_TYPE: patch
+
+This patch ensures that we always close the download connection in
+:class:`~hypothesis.database.GitHubArtifactDatabase`.

hypothesis-python/src/hypothesis/database.py

@@ -561,11 +561,11 @@ def _get_bytes(self, url: str) -> Optional[bytes]:  # pragma: no cover
                 "Authorization": f"Bearer {self.token}",
             },
         )
+        warning_message = None
         response_bytes: Optional[bytes] = None
         try:
-            response = urlopen(request)
-            response_bytes = response.read()
-            warning_message = None
+            with urlopen(request) as response:
+                response_bytes = response.read()
         except HTTPError as e:
             if e.code == 401:
                 warning_message = (