[PR #7333/3a54d378 backport][3.9] Fix TLS transport is None error (#…

…7358) Co-authored-by: Sam Bull <git@sambull.org> Fixes #3355
aio-libs · Jul 9, 2023 · 13047ee · 13047ee
1 parent a652ca9
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diff --git a/CHANGES/3355.bugfix b/CHANGES/3355.bugfix
@@ -0,0 +1 @@
+Fixed a transport is :data:`None` error -- by :user:`Dreamsorcerer`.
diff --git a/aiohttp/connector.py b/aiohttp/connector.py
@@ -1130,6 +1130,9 @@ async def _start_tls_connection(
                 f"[{type_err!s}]"
             ) from type_err
         else:
+            if tls_transport is None:
+                msg = "Failed to start TLS (possibly caused by closing transport)"
+                raise client_error(req.connection_key, OSError(msg))
             tls_proto.connection_made(
                 tls_transport
             )  # Kick the state machine of the new TLS protocol