Re: Issues with GWT Eclipse Plugin and Eclise Oxygen 1.a

I started with a clean Oxygen 1.a IDE and only installed the GWT plugin. It still fails.

Here is the full stacktrace of the exception:

java.lang.NoSuchMethodError: org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots([Lorg/eclipse/jdt/core/IClasspathEntry;ZLjava/util/Map;)[Lorg/eclipse/jdt/core/IPackageFragmentRoot;
    at com.google.gdt.eclipse.core.ClasspathUtilities.findRawClasspathEntryFor(ClasspathUtilities.java:163)
    at com.google.gwt.eclipse.core.runtime.GwtSdk$ProjectBoundSdk.findGwtDevClasspathEntry(GwtSdk.java:361)
    at com.google.gwt.eclipse.core.runtime.GwtSdk$ProjectBoundSdk.computeInstallPath(GwtSdk.java:266)
    at com.google.gwt.eclipse.core.runtime.GwtSdk$ProjectBoundSdk.getInstallationPath(GwtSdk.java:189)
    at com.google.gwt.eclipse.core.runtime.GwtSdk.findSdkFor(GwtSdk.java:411)
    at com.google.gwt.eclipse.core.validators.GWTProjectValidator.build(GWTProjectValidator.java:72)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:735)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:301)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:304)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:360)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:383)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:142)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:232)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)






On Wednesday, October 11, 2017 at 5:35:29 PM UTC-4, Oleg Cohen wrote:

Greetings,

I am wondering if anybody else ran into an error like this:

java.lang.NoSuchMethodError: org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(Lorg/eclipse/jdt/core/IClasspathEntry;Lorg/eclipse/jdt/internal/compiler/util/ObjectVector;Ljava/util/HashSet;Lorg/eclipse/jdt/core/IClasspathEntry;ZLjava/util/Map;)V

after upgrading to the most recent Eclipse Oxygen 1.a

I am having problems editing GWT properties of a project and also compiling my GWT application project as the GWT Project Validator fails with the above error.

Thanks!
Oleg

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