Bug#903491: marble: OSM Address Lookup Broken

[Christopher Howard <christopher@alaskasi.com>]

Package: marble
Version: 4:16.08.3-1
Severity: important

Dear Maintainer,

KDE Marble in Stretch used to be able to do searches on addresses or
partial city names, which I believe was using the Open Street Map
API. This functionality seems to have broken in the last few months,
but I do not know exactly when.

E.g., one could type "1600 Pennsylvania Avenue" in the search box, hit
enter, and it would give a list of all places containing that address.

If I launch Marble from the command prompt, and attempt these sorts of
searches, I see an error "Cannot parse osm nominatim result",
suggesting something has changed in the OSM API.

I do not have time to experiment with a newer version of Marble, but I
wouldn't be surprised if this hasn't been fixed upstream and the
change just needs to be backported.

Note: The search box auto-complete API still seems to work, although
only major city names are auto-completed.

-- System Information:
Debian Release: 9.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-6-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages marble depends on:
ii  kio                     5.28.0-2
ii  libc6                   2.24-11+deb9u3
ii  libgcc1                 1:6.3.0-18+deb9u1
ii  libkf5configcore5       5.28.0-2
ii  libkf5configgui5        5.28.0-2
ii  libkf5configwidgets5    5.28.0-2
ii  libkf5coreaddons5       5.28.0-2
ii  libkf5i18n5             5.28.0-2
ii  libkf5kiowidgets5       5.28.0-2
ii  libkf5newstuff5         5.28.0-1
ii  libkf5parts5            5.28.0-1
ii  libkf5runner5           5.28.0-1
ii  libkf5widgetsaddons5    5.28.0-3
ii  libkf5xmlgui5           5.28.0-1
ii  libmarblewidget-qt5-25  4:16.08.3-1
ii  libqt5core5a            5.7.1+dfsg-3+b1
ii  libqt5dbus5             5.7.1+dfsg-3+b1
ii  libqt5gui5              5.7.1+dfsg-3+b1
ii  libqt5network5          5.7.1+dfsg-3+b1
ii  libqt5printsupport5     5.7.1+dfsg-3+b1
ii  libqt5widgets5          5.7.1+dfsg-3+b1
ii  libqt5xml5              5.7.1+dfsg-3+b1
ii  libstdc++6              6.3.0-18+deb9u1
ii  marble-data             4:16.08.3-1
ii  marble-plugins          4:16.08.3-1

marble recommends no packages.

Versions of packages marble suggests:
pn  gosmore               <none>
pn  monav-routing-daemon  <none>
pn  routino               <none>

-- no debconf information