TicketQuery crashes Trac wiki

[rocky@…]

I was trying to show a single ticket number and summary in the wiki (so the summary is pulled from the ticket as opposed to manually entering it as display link text). I tried using TicketQuery by specifying a specific ticket (so the result would always be a single ticket). But trying to use ticket as a ticket field name causes an internal error. Is it possible to query the ticket number so as to avoid the error?

I used the following TicketQuery macro:

[[TicketQuery(ticket=94)]]

When I pressed submit, I received the following error

Trac detected an internal error:
ProgrammingError: current transaction is aborted, commands ignored until
end of transaction block

When I previewed it on the Trac demo site, I received the following error:

Error: Macro TicketQuery(ticket=1) failed
no such column: t.ticket

When I tried to enter this ticket on Edgewall's trac system, I forgot to escape the TicketQuery and got the following Python traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 406, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/ticket/web_ui.py", line 177, in process_request
    milestone = Milestone(self.env, option, db=db)
  File "/usr/lib/python2.4/site-packages/trac/ticket/model.py", line 552, in __init__
    self._fetch(name, db)
  File "/usr/lib/python2.4/site-packages/trac/ticket/model.py", line 564, in _fetch
    "FROM milestone WHERE name=%s", (name,))
  File "/usr/lib/python2.4/site-packages/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.4/site-packages/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
ProgrammingError: current transaction is aborted, commands ignored until end of transaction block

[Emmanuel Blot]

(dup of #5508, submitted twice)