Bug 9016

Summary:	DOM/AST: Problems with array.length access
Product:	[Eclipse Project] JDT	Reporter:	Dirk Baeumer <dirk_baeumer>
Component:	Core	Assignee:	Olivier Thomann <Olivier_Thomann>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3
Version:	2.0
Target Milestone:	2.0 M3
Hardware:	PC
OS:	Windows 2000
Whiteboard:

Description Dirk Baeumer

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

2002-02-04 08:51:07 EST

This will be fixed today.

Comment 2 Olivier Thomann

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

2002-02-04 12:07:31 EST

Released.