Crash in X11.XWindowPeer.restoreTransientFor when displaying most basic things

[anonymous]

What steps will reproduce the problem?

1. Download anything from OSM

OR

1. Create an empty data layer
2. Draw a way
3. Add a tag, for example "highway=residential".

What is the expected result?

Show the map content

What happens instead?

After the download, the message "preparing" data set appears, followed by a loop of NPEs.
The problem also occurs after the removal of all plugins. It occurred with rev. 4453 and rev. 4490.

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

I have updated my Fedora 15 yesterday. Rev 4453 had worked before the update. The update included kernel-2.6.40.6(=3.0.6), lzo-2.06, exiv2-libs-0.21, php-*-5.3.8 protobuf-2.3.0 and ibus-*-1.4.0.
The X server (Xorg 1.10.4 with intel_drv 2.15.0) on a GM965/GL960 rev. 3 hardware didn't change during that update.
However, the error message starts with "this is always a coding error", so you should be aware.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-10-07 01:32:25
Last Changed Author: Don-vip
Revision: 4490
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-10-06 21:04:04 +0200 (Thu, 06 Oct 2011)
Last Changed Rev: 4490

Identification: JOSM/1.5 (4490 en_GB)
Memory Usage: 43 MB / 479 MB (16 MB allocated, but free)
Java version: 1.6.0_22, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: OpeningHoursEditor (26606)
Plugin: alignways (26692)
Plugin: buildings_tools (26606)
Plugin: editgpx (26606)
Plugin: measurement (26606)
Plugin: openstreetbugs (26606)
Plugin: openvisible (26606)
Plugin: public_transport (26606)
Plugin: reverter (26606)
Plugin: terracer (26606)
Plugin: turnrestrictions (26666)
Plugin: waydownloader (26606)
Plugin: wayselector (26606)

java.lang.NullPointerException
	at sun.awt.X11.XWindowPeer.restoreTransientFor(XWindowPeer.java:1681)
	at sun.awt.X11.XWindowPeer.removeFromTransientFors(XWindowPeer.java:1747)
	at sun.awt.X11.XWindowPeer.setModalBlocked(XWindowPeer.java:1469)
	at sun.awt.X11.XWindowPeer.setModalBlocked(XWindowPeer.java:1440)
	at java.awt.Window.setModalBlocked(Window.java:1359)
	at java.awt.Dialog.unblockWindow(Dialog.java:1597)
	at java.awt.Dialog.modalHide(Dialog.java:1483)
	at java.awt.Dialog.hideAndDisposePreHandler(Dialog.java:1215)
	at java.awt.Dialog.hide(Dialog.java:1255)
	at java.awt.Component.show(Component.java:1553)
	at java.awt.Component.setVisible(Component.java:1503)
	at java.awt.Window.setVisible(Window.java:881)
	at java.awt.Dialog.setVisible(Dialog.java:1011)
	at org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor.close(PleaseWaitProgressMonitor.java:151)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:95)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:125)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:679

[Don-vip]

Closed as duplicate of #6435.