In GatewayStreamConsumer._run(), _final_content_delivered was set to True
based on the success of a mid-stream finalize edit, before the final
finalize edit was attempted. When the final edit later failed (Telegram
flood control, retry-after), _final_response_sent stayed False but
_final_content_delivered was already True, so gateway/run.py suppressed
its normal final send and the user saw a partial / fallback message
instead of the real answer.
Changes in gateway/stream_consumer.py:
- Remove the premature _final_content_delivered = True at the top of
the got_done block.
- Set _final_content_delivered = True only when the actual final send /
edit succeeds, in each finalize branch (no-finalize adapter,
_message_id finalize, no-_already_sent send).
- _send_fallback_final: don't set _final_response_sent = True when only
some chunks were delivered; the gateway should still attempt a
complete final send. Set _final_content_delivered = True alongside
_final_response_sent on the success path and short-text path.
- Cancellation handler: set _final_content_delivered = True alongside
_final_response_sent when the best-effort final edit succeeds.
Adds TestFinalContentDeliveredGuard with 3 regression tests covering
the core bug scenario, the happy path, and partial fallback.
Closes#33708Closes#25010
Refs #29200
Co-authored-by: Teknium <127238744+teknium1@users.noreply.github.com>
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