segfault when calling mapillary function

[malenki]

Tested with
blank ~/.josm
r8856
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-1~deb8u1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

What steps will reproduce the problem?

1. Run JOSM with mapillary plugin.
2. press "shift"+"," (or Imagery –> Mapillary)

What is the expected result?

Mapillary should load images.

What happens instead?

The error below.

Please provide any additional information below. Attach a screenshot if possible.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-10-11 13:31:06
Last Changed Author: Don-vip
Revision: 8856
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-10-11 15:28:33 +0200 (Sun, 11 Oct 2015)
Last Changed Rev: 8856

Identification: JOSM/1.5 (8856 de) Linux LMDE 2 Betsy
Memory Usage: 710 MB / 2222 MB (287 MB allocated, but free)
Java version: 1.7.0_79, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u79-2.5.6-1~deb8u1
VM arguments: [-Dsun.java2d.opengl=false]
Dataset consistency test: No problems found

Plugins:
- Mapillary (31603)
- commons-imaging (31603)

Last errors/warnings:
- E: java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;

java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
	at org.openstreetmap.josm.plugins.mapillary.io.download.MapillarySquareDownloadManagerThread.buildQueryString(MapillarySquareDownloadManagerThread.java:64)
	at org.openstreetmap.josm.plugins.mapillary.io.download.MapillarySquareDownloadManagerThread.<init>(MapillarySquareDownloadManagerThread.java:52)
	at org.openstreetmap.josm.plugins.mapillary.io.download.MapillaryDownloader.getImages(MapillaryDownloader.java:69)
	at org.openstreetmap.josm.plugins.mapillary.io.download.MapillaryDownloader.automaticDownload(MapillaryDownloader.java:158)
	at org.openstreetmap.josm.plugins.mapillary.MapillaryLayer.init(MapillaryLayer.java:121)
	at org.openstreetmap.josm.plugins.mapillary.MapillaryLayer.<init>(MapillaryLayer.java:104)
	at org.openstreetmap.josm.plugins.mapillary.MapillaryLayer.getInstance(MapillaryLayer.java:173)
	at org.openstreetmap.josm.plugins.mapillary.actions.MapillaryDownloadAction.actionPerformed(MapillaryDownloadAction.java:42)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1662)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2870)
	at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)
	at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:263)
	at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2962)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2954)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2833)
	at java.awt.Component.processEvent(Component.java:6293)
	at java.awt.Container.processEvent(Container.java:2229)
	at java.awt.Component.dispatchEventImpl(Component.java:4872)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1887)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
	at java.awt.Component.dispatchEventImpl(Component.java:4742)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
	at java.awt.EventQueue.access$300(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:706)
	at java.awt.EventQueue$3.run(EventQueue.java:704)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.awt.EventQueue$4.run(EventQueue.java:718)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)