API errors are silently ignored instead of notifying the user

[AM909]

Lately, the API is returning HTTP error 509 - Bandwidth Limit Exceeded - "You have downloaded too much data. Please try again later." when working on overly dense areas for an extended period of time. JOSM, however, silently ignores the error, and does not create the new layer (I had to packet trace to see the error).

Under some other unknown circumstances (perhaps a different error number), it creates the layer but presents a dialog that says something like "No data found in the selected area".

It should instead present the user with a dialog that shows the error code, name, and description as returned by the server.

(r3329)

[stoecker]

Already fixed in r3511. Try latest.

[stoecker]

Ticket #5316 has been marked as a duplicate of this ticket.