The GWT-Designer crashes my Eclipse completely.
This problem started, after upgrading from Ubuntu 32bit 12.10 to 32bit 13.04.
Windowbuilder plugin installs and works correctly. It designs even preciser than it did in 12.04.
The GWT plugin for Eclipse 4.2 Juno, on the other hand, installs correctly, allows generating projects with sample code, that run,
but does not allow Designer Editing. I crashes Eclipse.
Here are the error messages. A larger portion of the log file is attached.
!SESSION 2013-05-02 01:49:35.609 -----------------------------------------------
eclipse.buildId=M20130204-1200
java.version=1.7.0_17
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.jee.product
Command-line arguments: -os linux -ws gtk -arch x86 -product org.eclipse.epp.package.jee.product
!ENTRY org.eclipse.ui 4 4 2013-05-02 01:51:10.339
!MESSAGE Plug-in 'org.eclipse.jpt.jpa.ui' contributed an invalid Menu Extension (Path: 'org.eclipse.jpt.jpa.ui.menu.JpaTools' is invalid): org.eclipse.jpt.jpa.ui.generateEntities
!ENTRY org.eclipse.ui 4 4 2013-05-02 01:51:50.979
!MESSAGE Could not create action delegate for id: org.eclipse.jdt.debug.ui.actions.ManageBreakpointRulerAction
!ENTRY org.eclipse.equinox.registry 4 1 2013-05-02 01:51:50.979
!MESSAGE Plug-in org.eclipse.wb.core.java was unable to load class org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate.
!STACK 0
java.lang.ClassNotFoundException: org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate