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Build ID: M20080221-1800 Steps To Reproduce: 1. I have two java projects with complex inheritence and lots of generic types with upper bound wildcards, like: public interface GModelElement< NAMESPACE extends GNamespace<?, ?, ?, ?, ?> , PACKAGE extends GCwmPackage<?, ?, ?, ?, ?, ?> , DEPENDENCY extends GDependency<?, ?, ?, ?, ?> , CONSTRAINT extends GConstraint<?, ?, ?, ?, ?> > extends ModelElement , OwnedElement<NAMESPACE> , Importer<PACKAGE> , ClientDependency<DEPENDENCY> , UnderConstraint<CONSTRAINT> { ... and so on ... 2. Sorry I can't provide the full code, cause I didn't released it under a licence up to now, but it will be general public when finished. 3. The bug wasn't occurring from the beginning of the project, it rised after I had done more and more inheritence with those interfaces all defining new upper-bounds on each level. I can'say when it starts, but now there are 49 interfaces defined and the NullPointer occurres in every action of code-completion, except using it for defining the imports in top of a class/interface. 4. The configured buildpath is using two eclipse-projects, one for the API that contains only interfaces, and the other containing the related implementations for the API. 5. I even tried to start eclipse with more memory up to 1024M but the bug is still reproduceable 6. Hope you can help fixing this situation, cause coding without code-completion in such a complex project is very heavy, so I really need help on this Bug... More information: I found a StackTrace in the Log-File: !ENTRY org.eclipse.jdt.ui 2 0 2008-03-11 21:05:32.437 !MESSAGE The 'org.eclipse.jdt.ui.JavaTypeCompletionProposalComputer' proposal computer from the 'org.eclipse.jdt.ui' plug-in did not complete normally. The extension has thrown a runtime exception. !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.findSuperTypeWithSameErasure(TypeBinding.java:308) at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.isTypeArgumentContainedBy(TypeBinding.java:664) ... OR !ENTRY org.eclipse.jface.text 4 0 2008-03-11 21:12:07.937 !MESSAGE Unexpected runtime error while computing a text hover !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.findSuperTypeWithSameErasure(TypeBinding.java:308) at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.isTypeArgumentContainedBy(TypeBinding.java:664) at org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding.isEquivalentTo(ParameterizedTypeBinding.java:668) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.implementsInterface(ReferenceBinding.java:774) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.isCompatibleWith0(ReferenceBinding.java:899) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.isCompatibleWith(ReferenceBinding.java:852) at org.eclipse.jdt.internal.compiler.lookup.TypeVariableBinding.boundCheck(TypeVariableBinding.java:146) at org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding.boundCheck(ParameterizedTypeBinding.java:70) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.checkBounds(ParameterizedSingleTypeReference.java:40) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.checkParameterizedTypeBounds(ClassScope.java:787) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.checkParameterizedTypes(CompilationUnitScope.java:206) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:275) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.lookup.Scope.connectTypeVariables(Scope.java:472) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:965) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.lookup.Scope.connectTypeVariables(Scope.java:472) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:965) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.lookup.Scope.connectTypeVariables(Scope.java:472) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:965) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.lookup.Scope.connectTypeVariables(Scope.java:472) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:965) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:449) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:503) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.resolveSingleImport(CompilationUnitScope.java:696) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2374) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperInterfaces(ClassScope.java:917) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:963) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:837) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:962) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:837) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:962) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:837) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:962) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:449) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:503) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.resolveSingleImport(CompilationUnitScope.java:696) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2374) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:837) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:962) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.SingleTypeReference.getTypeBinding(SingleTypeReference.java:44) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveType(TypeReference.java:163) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:837) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:962) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.SelectionEngine.select(SelectionEngine.java:681) at org.eclipse.jdt.internal.core.Openable.codeSelect(Openable.java:155) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:340) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:334) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover.getHoverInfo(AbstractJavaEditorTextHover.java:117) at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo(BestMatchHover.java:102) at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo(JavaEditorTextHoverProxy.java:69) at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:165)
Can you reproduce it with a 3.4 build ? (say 3.4M5 for instance) Given the complexity of your code, I am afraid that a testcase will be mandated.
The NPE would indicate that superinterfaces are still null, where an array should have been assigned at that stage.
Bjoern - were you able to reproduce this problem with a recent 3.4 build ?
waiting for feedback from a recent 3.4 build
From Bjoern in an email: this stacktrace below occured after downloading the latest ganymede Build-ID (UTC): 20080304-640 The first Exception might be caused by startup, cause Ganymede gave me an error Msg on startup. [first stacktrace was deleted] But the second stacktrace is caused by the reproducable code completion with my workspace. !SESSION 2008-03-19 23:27:58.687 ----------------------------------------------- eclipse.buildId=M20080221-1800 java.version=1.6.0_03 java.vendor=Sun Microsystems Inc. BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE Framework arguments: eclipse Command-line arguments: -os win32 -ws win32 -arch x86 -data C:\NullPointer eclipse !ENTRY org.eclipse.jface.text 4 0 2008-03-19 23:30:17.234 !MESSAGE Unexpected runtime error while computing a text hover !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.findSuperTypeWithSameErasure(TypeBinding.java:308) at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.isTypeArgumentContainedBy(TypeBinding.java:664) at org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding.isEquivalentTo(ParameterizedTypeBinding.java:668) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.implementsInterface(ReferenceBinding.java:774) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.isCompatibleWith0(ReferenceBinding.java:899) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.isCompatibleWith(ReferenceBinding.java:852) at org.eclipse.jdt.internal.compiler.lookup.TypeVariableBinding.boundCheck(TypeVariableBinding.java:146) at org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding.boundCheck(ParameterizedTypeBinding.java:70) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.checkBounds(ParameterizedSingleTypeReference.java:40) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.checkParameterizedTypeBounds(ClassScope.java:787) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.checkParameterizedTypes(CompilationUnitScope.java:206) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:275) ... at org.eclipse.jdt.internal.codeassist.impl.Engine.accept(Engine.java:93) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:134) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:2394) at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2132) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.internalResolveType(ParameterizedSingleTypeReference.java:98) at org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference.resolveType(ParameterizedSingleTypeReference.java:222) at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:114) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1123) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperInterfaces(ClassScope.java:917) at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:963) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:290) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:274) at org.eclipse.jdt.internal.codeassist.SelectionEngine.select(SelectionEngine.java:681) at org.eclipse.jdt.internal.core.Openable.codeSelect(Openable.java:155) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:340) at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:334) at org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover.getHoverInfo(AbstractJavaEditorTextHover.java:117) at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo(BestMatchHover.java:102) at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo(JavaEditorTextHoverProxy.java:69) at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:165)
Created attachment 96451 [details] Proposed patch Using Bjoern's workspace I was able to reproduce this walkback. It only appears in code assist and reconcile operations.
Reduced his code to this fun example, trying hovering over Z in the interface X: public interface C<T extends U<? extends C<?>>> {} public interface N<T extends O<? extends N<?>>> {} public interface O<T extends N<? extends O<?>>> {} public interface U<T extends C<? extends U<?>>> {} public interface X< T1 extends Y<?, ?, ?>, T2 extends Z<?, ?, ?> > extends O<T1> , U<T2> {} public interface Y< T1 extends Y<?, ?, ?>, T2 extends Z<?, ?, ?>, T3 extends X<?, ?> > extends X<T1, T2>, N<T3> {} public interface Z< T1 extends Y<?, ?, ?>, T2 extends Z<?, ?, ?>, T3 extends X<?, ?> >extends X<T1, T2>, C<T3> {}
Released fix into HEAD for 3.4M7
Backported to 3.3 maintenance branch Released for 3.4M7
Created attachment 96896 [details] Testcase Released testcase
*** Bug 196920 has been marked as a duplicate of this bug. ***
Verified for 3.4M7 using I20080427-2000
