DartNodeTraverser NPE in editor not in DartC

[danrubel]

[user feedback]
The following code results in an NPE in the editor but not when running dartc:

library('lib');

class Foo {
}x

class Bar extends Foo {
 List<int> i;
}

void main() {
 new Test().run();
}

Removing 'x' after the curly brace removes the NPE.

karlklose@google.com

////////////////////////////////////////////////////////////////////////////////////
Editor Version: 2374
OS: Linux
////////////////////////////////////////////////////////////////////////////////////

!ENTRY com.google.dart.tools.ui 4 10001 2011-12-13 14:28:07.018
!MESSAGE Internal Error
!STACK 1
Dart Model Exception: Core Exception [code 0] Failed to parse file:${user.home}/test/Test.dart
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:762)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)
Caused by: java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       ... 5 more
Caused by: org.eclipse.core.runtime.CoreException: Failed to parse file:${user.home}/test/Test.dart
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:763)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)
Caused by: java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       ... 5 more
!SUBENTRY 1 com.google.dart.tools.core 4 0 2011-12-13 14:28:07.023
!MESSAGE Failed to parse file:${user.home}/test/Test.dart
!STACK 0
java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)

!ENTRY com.google.dart.tools.ui 4 10001 2011-12-13 14:28:14.055
!MESSAGE Internal Error
!STACK 1
Dart Model Exception: Core Exception [code 0] Failed to parse file:${user.home}/test/Test.dart
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:762)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)
Caused by: java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       ... 5 more
Caused by: org.eclipse.core.runtime.CoreException: Failed to parse file:${user.home}/test/Test.dart
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:763)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)
Caused by: java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       ... 5 more
!SUBENTRY 1 com.google.dart.tools.core 4 0 2011-12-13 14:28:14.063
!MESSAGE Failed to parse file:${user.home}/test/Test.dart
!STACK 0
java.lang.NullPointerException
       at com.google.dart.compiler.ast.DartBinaryExpression.visitChildren(DartBinaryExpression.java:66)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExpression(DartNodeTraverser.java:67)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBinaryExpression(DartNodeTraverser.java:111)
       at com.google.dart.compiler.ast.DartBinaryExpression.accept(DartBinaryExpression.java:72)
       at com.google.dart.compiler.ast.DartExprStmt.visitChildren(DartExprStmt.java:31)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitExprStmt(DartNodeTraverser.java:191)
       at com.google.dart.compiler.ast.DartExprStmt.accept(DartExprStmt.java:36)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartBlock.visitChildren(DartBlock.java:44)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitStatement(DartNodeTraverser.java:71)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitBlock(DartNodeTraverser.java:116)
       at com.google.dart.compiler.ast.DartBlock.accept(DartBlock.java:49)
       at com.google.dart.compiler.ast.DartFunction.visitChildren(DartFunction.java:57)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitFunction(DartNodeTraverser.java:216)
       at com.google.dart.compiler.ast.DartFunction.accept(DartFunction.java:66)
       at com.google.dart.compiler.ast.DartMethodDefinition.visitChildren(DartMethodDefinition.java:85)
       at com.google.dart.compiler.ast.DartMethodDefinition$DartMethodWithInitializersDefinition.visitChildren(DartMethodDefinition.java:121)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitDeclaration(DartNodeTraverser.java:87)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitClassMember(DartNodeTraverser.java:91)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitMethodDefinition(DartNodeTraverser.java:276)
       at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:90)
       at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
       at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
       at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
       at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:34)
       at com.google.dart.compiler.resolver.SupertypeResolver.exec(SupertypeResolver.java:27)
       at com.google.dart.compiler.DartCompiler$Compiler.resolveLibraries(DartCompiler.java:548)
       at com.google.dart.compiler.DartCompiler$Compiler.updateAndResolve(DartCompiler.java:218)
       at com.google.dart.compiler.DartCompiler$Compiler.access$4(DartCompiler.java:193)
       at com.google.dart.compiler.DartCompiler.analyzeLibrary(DartCompiler.java:1197)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.secureAnalyzeLibrary(DartCompilerUtilities.java:777)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$ResolverRunnable.run(DartCompilerUtilities.java:440)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities$CompilerRunner.runSafe(DartCompilerUtilities.java:95)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:760)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:742)
       at com.google.dart.tools.core.utilities.compiler.DartCompilerUtilities.resolveUnit(DartCompilerUtilities.java:706)
       at com.google.dart.tools.ui.internal.text.editor.DartEditor.getAST(DartEditor.java:2010)
       at com.google.dart.tools.ui.internal.text.editor.DartTextHover.getHoverInfo(DartTextHover.java:46)
       at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:168)

[bwilkerson]

Is this a bug in the compiler, or is there some option/state that Editor ought to be using that we're not?

I explored a little bit and the exception is occurring because there is a BinaryExpression whose left operand is null.

I'm not familiar with the command-line version. Does it try to resolve the code if there were syntax errors? (Just trying to guess why Editor is seeing this when the command-line tool isn't.)

---

Removed Area-Editor label.
Added Area-Compiler label.

[jtmcdole]

DartC does not resolve if there were parse errors, it quits after reporting them.

[jtmcdole]

Just noticed that we're not treating class as a reserved word, which snowballed in the parser to produce a bad AST in this case. Looking at now.

---

Set owner to @jtmcdole.
Added Accepted label.

[jtmcdole]

There are still NPE's, but they appear to be due to a configuration issue. I honestly would like to see this not consume the "class" token and try to restart parsing from the top level.

http://codereview.chromium.org/8993011

[jtmcdole]

Set owner to @danrubel.
Added Fixed label.

[jtmcdole]

Added Accepted label.

[danrubel]

Patched it in and works for me.

---

Set owner to @jtmcdole.

[jtmcdole]

http://code.google.com/p/dart/source/detail?r=2600

---

Added Fixed label.