Bad task traversal or link

Traceback (innermost last):

    * Module zope.publisher.publish, line 135, in publish
      object = request.traverse(object)
    * Module zope.publisher.browser, line 494, in traverse
      ob = super(BrowserRequest, self).traverse(object)
    * Module zope.publisher.http, line 382, in traverse
      ob = super(HTTPRequest, self).traverse(object)
    * Module zope.publisher.base, line 270, in traverse
      subobject = publication.traverseName(
    * Module zope.app.publication.publicationtraverse, line 56, in traverseName
      ob2 = adapter.publishTraverse(request, nm)
    * Module canonical.launchpad.webapp.metazcml, line 393, in publishTraverse
      traversed_to = getattr(self.context, self._getter)(name)
    * Module canonical.launchpad.database.bugset, line 18, in __getitem__
      item = self.table.selectOne(self.table.q.id == id)
    * Module sqlobject.main, line 1038, in selectOne
      connection=connection))
    * Module sqlobject.main, line 1495, in __iter__
      return conn.iterSelect(self)
    * Module sqlobject.dbconnection, line 635, in iterSelect
      select, keepConnection=True)))
    * Module sqlobject.dbconnection, line 567, in __init__
      self.dbconn._executeRetry(self.rawconn, self.cursor, self.query)
    * Module sqlobject.dbconnection, line 204, in _executeRetry
      return cursor.execute(query)
    * Module zope.app.rdb, line 283, in execute
      return self.cursor.execute(operation)

ProgrammingError: ERROR: invalid input syntax for integer: "+distrotask" SELECT BugWatch.id, BugWatch.remotebug, BugWatch.datecreated, BugWatch.lastchanged, BugWatch.lastchecked, BugWatch.bug, BugWatch.owner, BugWatch.remotestatus, BugWatch.bugtracker FROM BugWatch WHERE (BugWatch.id = '+distrotask')

Traceback (innermost last):

    * Module zope.publisher.publish, line 135, in publish
      object = request.traverse(object)
    * Module zope.publisher.browser, line 494, in traverse
      ob = super(BrowserRequest, self).traverse(object)
    * Module zope.publisher.http, line 382, in traverse
      ob = super(HTTPRequest, self).traverse(object)
    * Module zope.publisher.base, line 270, in traverse
      subobject = publication.traverseName(
    * Module zope.app.publication.publicationtraverse, line 56, in traverseName
      ob2 = adapter.publishTraverse(request, nm)
    * Module canonical.launchpad.webapp.metazcml, line 393, in publishTraverse
      traversed_to = getattr(self.context, self._getter)(name)
    * Module canonical.launchpad.database.bugset, line 18, in __getitem__
      item = self.table.selectOne(self.table.q.id == id)
    * Module sqlobject.main, line 1038, in selectOne
      connection=connection))
    * Module sqlobject.main, line 1495, in __iter__
      return conn.iterSelect(self)
    * Module sqlobject.dbconnection, line 635, in iterSelect
      select, keepConnection=True)))
    * Module sqlobject.dbconnection, line 567, in __init__
      self.dbconn._executeRetry(self.rawconn, self.cursor, self.query)
    * Module sqlobject.dbconnection, line 204, in _executeRetry
      return cursor.execute(query)
    * Module zope.app.rdb, line 283, in execute
      return self.cursor.execute(operation)

ProgrammingError: ERROR: invalid input syntax for integer: "+upstreamtask" SELECT BugSubscription.id, BugSubscription.bug, BugSubscription.person, BugSubscription.subscription FROM BugSubscription WHERE (BugSubscription.id = '+upstreamtask')

I don't understand how these URLs could have been generated -- the only reference to them is in the tasks headline list. Stuart, can we look at the server logs and pick up the referer for the original exceptions?

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1894