fix(slack): close previous handler in connect() to prevent zombie Socket Mode connections#19181
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…ket Mode connections SlackAdapter.connect() overwrote self._handler, self._app, and self._socket_mode_task without closing the prior AsyncSocketModeHandler first. If connect() was called a second time on the same adapter (e.g. during a gateway restart or in-process reconnect attempt), the old Socket Mode websocket stayed alive. Both the old and new connections received every Slack event and dispatched it twice — producing double responses with different wording, the same bug that affected DiscordAdapter (#18187, fixed in #18758). Fix: add a close-before-reassign guard at the start of the connection setup path, mirroring the guard DiscordAdapter.connect() already has. When self._handler is None (fresh adapter, first connect()) the block is a harmless no-op. Scoped to the handler/app fields only — no behavior change for any path that does not call connect() twice. Fixes #18980
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Salvage of PR #18982 by @nftpoetrist. Fixes #18980.
connect()overwroteself._handlerandself._appwithout closing the priorAsyncSocketModeHandler. A secondconnect()call (gateway restart/reconnect) left a zombie Socket Mode websocket alive, causing double-dispatch of every Slack event — producing double responses.Parity fix with the already-merged Discord fix (#18758). Adds close-before-reassign guard + regression test.
Changes: gateway/platforms/slack.py (+15 lines), tests/gateway/test_slack.py (+54 lines), scripts/release.py (AUTHOR_MAP)
Tests: 2 passed in TestSlackConnectCleanup