[Geocoding] [OpenStreetMap] #5319: nominatim search error when using polygon=1

[OpenStreetMap]

#5319: nominatim search error when using polygon=1
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 Reporter:  baugeo@…   |      Owner:  geocoding@…
     Type:  defect     |     Status:  new
 Priority:  critical   |  Milestone:
Component:  nominatim  |    Version:
 Keywords:             |
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 Hello,

 we get a 500 Internal Server Error when searching for Berlin:

 http://nominatim.openstreetmap.org/search?q=,%20,%20Berlin,%20,%20Deutschland&format=json
 &accept-language=de&polygon=1&addressdetails=1

 This search structure worked for over one year but fails since some days
 or perhaps weeks. The reason is the polygon=1.
 I know it is deprecated but it is still allowed and used in the sources of
 the location plugin of the qt framework. So many apps may be affected by
 this bug.

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Ticket URL: <https://trac.openstreetmap.org/ticket/5319>
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