Bug 9016 - DOM/AST: Problems with array.length access
Summary: DOM/AST: Problems with array.length access
Status: RESOLVED FIXED
Alias: None
Product: JDT
Classification: Eclipse Project
Component: Core (show other bugs)
Version: 2.0   Edit
Hardware: PC Windows 2000
: P3 normal (vote)
Target Milestone: 2.0 M3   Edit
Assignee: Olivier Thomann CLA
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Reported: 2002-02-04 08:06 EST by Dirk Baeumer CLA
Modified: 2002-02-11 04:52 EST (History)
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Description Dirk Baeumer CLA 2002-02-04 08:06:53 EST 
Asking the VariableBinding of 'array'.length for a key results in a null 
pointer exception. The stack trace is:

Stack trace:
   java/lang/Throwable.<init>()V
   java/lang/Throwable.<init>(Ljava/lang/String;)V
   java/lang/NullPointerException.<init>(Ljava/lang/String;)V
   org/eclipse/jdt/core/dom/DefaultBindingResolver.getTypeBinding
(Lorg/eclipse/jdt/internal/compiler/lookup/TypeBinding;)
Lorg/eclipse/jdt/core/dom/ITypeBinding;
   org/eclipse/jdt/core/dom/VariableBinding.getDeclaringClass()
Lorg/eclipse/jdt/core/dom/ITypeBinding;
   org/eclipse/jdt/core/dom/VariableBinding.getKey()Ljava/lang/String;
   org/eclipse/jdt/internal/corext/dom/BindingIdentifier.matches
(Lorg/eclipse/jdt/core/dom/IBinding;)Z
   
org/eclipse/jdt/internal/corext/refactoring/sef/AccessAnalyzer.getFieldBinding
(Lorg/eclipse/jdt/core/dom/Name;)Lorg/eclipse/jdt/core/dom/IVariableBinding;
   
org/eclipse/jdt/internal/corext/refactoring/sef/AccessAnalyzer.handleSimpleName
(Lorg/eclipse/jdt/core/dom/SimpleName;)V
   org/eclipse/jdt/internal/corext/refactoring/sef/AccessAnalyzer.visit
(Lorg/eclipse/jdt/core/dom/SimpleName;)Z
   org/eclipse/jdt/core/dom/SimpleName.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChild
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode;)V
   org/eclipse/jdt/core/dom/QualifiedName.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChildren
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode$NodeList
;)V
   org/eclipse/jdt/core/dom/MethodInvocation.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChild
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode;)V
   org/eclipse/jdt/core/dom/ExpressionStatement.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChildren
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode$NodeList
;)V
   org/eclipse/jdt/core/dom/Block.accept0(Lorg/eclipse/jdt/core/dom/ASTVisitor;)
V
   org/eclipse/jdt/core/dom/ASTNode.acceptChild
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode;)V
   org/eclipse/jdt/core/dom/MethodDeclaration.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChildren
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode$NodeList
;)V
   org/eclipse/jdt/core/dom/TypeDeclaration.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.acceptChildren
(Lorg/eclipse/jdt/core/dom/ASTVisitor;Lorg/eclipse/jdt/core/dom/ASTNode$NodeList
;)V
   org/eclipse/jdt/core/dom/CompilationUnit.accept0
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   org/eclipse/jdt/core/dom/ASTNode.accept
(Lorg/eclipse/jdt/core/dom/ASTVisitor;)V
   
org/eclipse/jdt/internal/corext/refactoring/sef/SelfEncapsulateFieldRefactoring.
checkInput(Lorg/eclipse/core/runtime/IProgressMonitor;)
Lorg/eclipse/jdt/internal/corext/refactoring/base/RefactoringStatus;
   org/eclipse/jdt/internal/ui/refactoring/CheckConditionsOperation.run
(Lorg/eclipse/core/runtime/IProgressMonitor;)V
   org/eclipse/jdt/internal/ui/refactoring/CreateChangeOperation.run
(Lorg/eclipse/core/runtime/IProgressMonitor;)V
   org/eclipse/jface/operation/ModalContext$ModalContextThread.run()V

Reason is that the declaringClass of the compiler's FieldBinding is null.
Comment 1 Olivier Thomann CLA 2002-02-04 08:51:07 EST 
This will be fixed today.
Comment 2 Olivier Thomann CLA 2002-02-04 11:08:44 EST 
In case the field is .length, there is no declaring class associated with it. Then the getKey() on a 
VariableBinding should check if the declaring class is not null, before trying to include the 
declaring class getKey() inside the variable binding key.
Fixed. Wait for the build input to 
release it.
Comment 3 Olivier Thomann CLA 2002-02-04 12:07:31 EST 
Released.