NPE from CompileTimeConstantAnalyzer - optional parameter set to getter

[jtmcdole]

Compile:
Function get asdf() {
  print("getter called");
  return () => print("function called:");
}

toplevel([var x = asdf]) {
  x();
}

void main() {
  toplevel();
}

Output:

test1.dart:6: Expected constant expression
     5:
     6: toplevel([var x = asdf]) {
test1.dart:1: Expected constant expression
     1: Function get asdf() {
java.lang.NullPointerException
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$ExpressionVisitor.getMostSpecificType(CompileTimeConstantAnalyzer.java:132)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$ExpressionVisitor.visitField(CompileTimeConstantAnalyzer.java:250)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$ExpressionVisitor.visitField(CompileTimeConstantAnalyzer.java:65)
    at com.google.dart.compiler.ast.DartField.accept(DartField.java:78)
    at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$ExpressionVisitor.visitIdentifier(CompileTimeConstantAnalyzer.java:295)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$ExpressionVisitor.visitIdentifier(CompileTimeConstantAnalyzer.java:65)
    at com.google.dart.compiler.ast.DartIdentifier.accept(DartIdentifier.java:78)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer.checkConstantExpression(CompileTimeConstantAnalyzer.java:585)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer.access$700(CompileTimeConstantAnalyzer.java:63)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$FindCompileTimeConstantExpressionsVisitor.visitMethodDefinition(CompileTimeConstantAnalyzer.java:500)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$FindCompileTimeConstantExpressionsVisitor.visitMethodDefinition(CompileTimeConstantAnalyzer.java:486)
    at com.google.dart.compiler.ast.DartMethodDefinition.accept(DartMethodDefinition.java:83)
    at com.google.dart.compiler.ast.DartNodeTraverser.visit(DartNodeTraverser.java:413)
    at com.google.dart.compiler.ast.DartUnit.visitChildren(DartUnit.java:99)
    at com.google.dart.compiler.ast.DartNodeTraverser.visitNode(DartNodeTraverser.java:54)
    at com.google.dart.compiler.ast.DartNodeTraverser.visitUnit(DartNodeTraverser.java:391)
    at com.google.dart.compiler.ast.DartUnit.accept(DartUnit.java:107)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer.exec(CompileTimeConstantAnalyzer.java:590)
    at com.google.dart.compiler.resolver.CompileTimeConstantAnalyzer$Phase.exec(CompileTimeConstantAnalyzer.java:555)
    at com.google.dart.compiler.DartCompiler$Compiler.compileLibraries(DartCompiler.java:713)
    at com.google.dart.compiler.DartCompiler$Compiler.compile(DartCompiler.java:178)
    at com.google.dart.compiler.DartCompiler$Compiler.access$200(DartCompiler.java:122)
    at com.google.dart.compiler.DartCompiler.compileLib(DartCompiler.java:1147)
    at com.google.dart.compiler.DartCompiler.compileLib(DartCompiler.java:1123)
    at com.google.dart.compiler.DartCompiler.compileApp(DartCompiler.java:1064)
    at com.google.dart.compiler.DartCompiler.compilerMain(DartCompiler.java:997)
    at com.google.dart.compiler.DartCompiler.compilerMain(DartCompiler.java:984)
    at com.google.dart.compiler.DartCompiler.main(DartCompiler.java:944)

[jtmcdole]

Set owner to @jtmcdole.

[jtmcdole]

http://codereview.chromium.org/9052002

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Added Started label.

[jtmcdole]

http://code.google.com/p/dart/source/detail?r=2876

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Added Fixed label.