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Having this XtendClass: class Foo extends Bar implements { } You will see the following NullPointerException when you try to typ after the keyword implements happening in the Scoeprovider. Without extending some Class the Nullpointers are gone. java.lang.NullPointerException at java.lang.String.compareTo(String.java:1167) at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider$2.compare(JvmFeatureScopeProvider.java:176) at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider$2.compare(JvmFeatureScopeProvider.java:1) at java.util.Arrays.mergeSort(Arrays.java:1270) at java.util.Arrays.sort(Arrays.java:1210) at java.util.Collections.sort(Collections.java:159) at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider.linearizeTypeHierarchy(JvmFeatureScopeProvider.java:161) at org.eclipse.xtext.xbase.scoping.featurecalls.JvmFeatureScopeProvider.createFeatureScopeForTypeRef(JvmFeatureScopeProvider.java:88) at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createFeatureScopeForTypeRef(XbaseScopeProvider.java:633) at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createImplicitFeatureCallScope(XbaseScopeProvider.java:421) at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createSimpleFeatureCallScope(XbaseScopeProvider.java:357) at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.createFeatureCallScope(XbaseScopeProvider.java:327) at org.eclipse.xtext.xbase.scoping.XbaseScopeProvider.getScope(XbaseScopeProvider.java:155) at org.eclipse.xtext.xbase.annotations.scoping.XbaseWithAnnotationsScopeProvider.getScope(XbaseWithAnnotationsScopeProvider.java:50) at org.eclipse.xtext.xbase.linking.XbaseLinkingScopeProvider.getScope(XbaseLinkingScopeProvider.java:42) at org.eclipse.xtext.linking.impl.DefaultLinkingService.getScope(DefaultLinkingService.java:59) at org.eclipse.xtext.linking.impl.DefaultLinkingService.getLinkedObjects(DefaultLinkingService.java:119) at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:173) at org.eclipse.xtext.xbase.resource.XbaseResource.access$0(XbaseResource.java:1) at org.eclipse.xtext.xbase.resource.XbaseResource$1.exec(XbaseResource.java:32) at org.eclipse.xtext.xbase.resource.XbaseResource$1.exec(XbaseResource.java:1) at org.eclipse.xtext.util.OnChangeEvictingCache.execWithoutCacheClear(OnChangeEvictingCache.java:67) at org.eclipse.xtext.xbase.resource.XbaseResource.getEObject(XbaseResource.java:30) at org.eclipse.xtext.xtend2.resource.Xtend2Resource.getEObject(Xtend2Resource.java:88) at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReference(LazyLinkingResource.java:141) at org.eclipse.xtext.linking.lazy.LazyLinkingResource.resolveLazyCrossReferences(LazyLinkingResource.java:102) at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:485) at org.eclipse.xtext.validation.ResourceValidatorImpl.resolveProxies(ResourceValidatorImpl.java:127) at org.eclipse.xtext.validation.ResourceValidatorImpl.validate(ResourceValidatorImpl.java:62) at org.eclipse.xtext.ui.editor.validation.ValidationJob$1.exec(ValidationJob.java:79) at org.eclipse.xtext.ui.editor.validation.ValidationJob$1.exec(ValidationJob.java:1) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.readOnly(AbstractReadWriteAcces.java:32) at org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(XtextDocument.java:78) at org.eclipse.xtext.ui.editor.validation.ValidationJob.createIssues(ValidationJob.java:75) at org.eclipse.xtext.ui.editor.validation.ValidationJob.run(ValidationJob.java:64) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Sebastian. Should I have a look at this issue?
(In reply to comment #1) > Sebastian. Should I have a look at this issue? Sure, a patch is most welcome if you find the time :-)
Created attachment 205031 [details] suggested fix Suggested fix for the problem. Please review.
After a discussion with Sebastian I pushed a slightly differnt version of the patch with same result. Pushed to master.
Closing all bugs that were set to RESOLVED before Neon.0
