Revert "Fix some crashes in dartk."

pkg/kernel/lib/analyzer/ast_from_analyzer.dart

Index: pkg/kernel/lib/analyzer/ast_from_analyzer.dart
diff --git a/pkg/kernel/lib/analyzer/ast_from_analyzer.dart b/pkg/kernel/lib/analyzer/ast_from_analyzer.dart
index cbbf53ea29593bb3c3d1d3e6e6373d64d072a1db..7bf54a7f464d0e0edcb367f8c584c1554cf2a1a5 100644
--- a/pkg/kernel/lib/analyzer/ast_from_analyzer.dart
+++ b/pkg/kernel/lib/analyzer/ast_from_analyzer.dart
@@ -754,14 +754,11 @@ class ExpressionScope extends TypeScope {
     return new ast.Throw(new ast.StringLiteral(message));
   }
 
-  ast.Expression buildThrowCompileTimeErrorFromCode(ErrorCode code,
-      [List arguments]) {
-    return buildThrowCompileTimeError(makeErrorMessage(code, arguments));
-  }
-
   static final RegExp _errorMessagePattern = new RegExp(r'\{(\d+)\}');
 
-  String makeErrorMessage(ErrorCode error, [List arguments]) {
+  /// Throws an exception that will be caught at the function level, to replace
+  /// the entire function with a throw.
+  emitCompileTimeError(ErrorCode error, [List arguments]) {
     String message = error.message;
     if (arguments != null) {
       message = message.replaceAllMapped(_errorMessagePattern, (m) {
@@ -770,13 +767,7 @@ class ExpressionScope extends TypeScope {
         return arguments[index];
       });
     }
-    return message;
-  }
-
-  /// Throws an exception that will be caught at the function level, to replace
-  /// the entire function with a throw.
-  emitCompileTimeError(ErrorCode error, [List arguments]) {
-    throw new _CompilationError(makeErrorMessage(error, arguments));
+    throw new _CompilationError(message);
   }
 
   ast.Expression buildThrowAbstractClassInstantiationError(String name) {
@@ -1702,9 +1693,6 @@ class ExpressionBuilder
         if (isTopLevelFunction(function)) {
           return scope.staticAccess(node.name, function);
         }
-        if (function == function.library.loadLibraryFunction) {
-          return scope.unsupportedFeature('Deferred loading');
-        }
         return new VariableAccessor(scope.getVariableReference(function));
 
       case ElementKind.LOCAL_VARIABLE:
@@ -2749,18 +2737,9 @@ class MemberBodyBuilder extends GeneralizingAstVisitor<Null> {
     }
     for (var parameter in node.parameters.parameterElements) {
       if (parameter is FieldFormalParameterElement) {
-        ast.Initializer initializer;
-        if (parameter.field == null) {
-          initializer = new ast.LocalInitializer(
-              new ast.VariableDeclaration.forValue(scope
-                  .buildThrowCompileTimeErrorFromCode(
-                      CompileTimeErrorCode.INITIALIZER_FOR_NON_EXISTENT_FIELD,
-                      [parameter.name])));
-        } else {
-          initializer = new ast.FieldInitializer(
-              scope.getMemberReference(parameter.field),
-              new ast.VariableGet(scope.getVariableReference(parameter)));
-        }
+        var initializer = new ast.FieldInitializer(
+            scope.getMemberReference(parameter.field),
+            new ast.VariableGet(scope.getVariableReference(parameter)));
         constructor.initializers.add(initializer..parent = constructor);
       }
     }