[tor-bugs] #12191 [Tor]: command_process_create_cell: calls channel_send_destroy() for already exist circuit

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#12191: command_process_create_cell: calls channel_send_destroy() for already exist
circuit
-------------------------+---------------------
 Reporter:  cypherpunks  |          Owner:
     Type:  defect       |         Status:  new
 Priority:  normal       |      Milestone:
Component:  Tor          |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
-------------------------+---------------------
 `command_process_create_cell` tries to check several conditions and can to
 call `channel_send_destroy` for already exist circuit.
 `channel_send_destroy` is more complex mechanism than sending of some cell
 as it happened before.
 It shouldn't to call `channel_send_destroy` if `circ_id` already exist for
 `chan`. It should to check `circ_id` and drop if already exist and only
 then to check all another stuff.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12191>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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