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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