Only set initializer fields as fields, not properties.

frog/frogsh

Index: frog/frogsh
diff --git a/frog/frogsh b/frog/frogsh
index dc6d0e4a7adbdc1f26dc52b592c8095f8e13733a..b1811c4e3aab38e9bc3198b9206b56d6e0e0b047 100755
--- a/frog/frogsh
+++ b/frog/frogsh
@@ -6960,7 +6960,6 @@ function Keyword(syntax, isPseudo) {
   this.isPseudo = isPseudo;
   // Initializers done
 }
-Keyword.prototype.is$Keyword = function(){return this;};
 Keyword.prototype.is$SourceString = function(){return this;};
 Keyword.get$keywords = function() {
   if ($notnull_bool(Keyword._keywords == null)) {
@@ -7067,8 +7066,7 @@ ArrayKeywordState.prototype.toString = function() {
 }
 // ********** Code for LeafKeywordState **************
 function LeafKeywordState(syntax) {
-  var $0;
-  this.keyword = (($0 = Keyword.get$keywords().$index(syntax)) && $0.is$Keyword());
+  this.keyword = Keyword.get$keywords().$index(syntax);
   // Initializers done
 }
 $inherits(LeafKeywordState, KeywordState);
@@ -11113,7 +11111,6 @@ MethodGenerator.prototype._provideOptionalParamInfo = function(defWriter) {
   }
 }
 MethodGenerator.prototype.writeBody = function() {
-  var $0;
   var initializers = null;
   var initializedFields = null;
   if ($notnull_bool(this.method.get$isConstructor())) {
@@ -11179,9 +11176,17 @@ MethodGenerator.prototype.writeBody = function() {
             world.error('invalid left side of initializer', left.get$span());
             continue;
           }
-          initializedFields.add(left.get$name().get$name());
-          var assign = this._makeThisValue(null).set_(this, $assert_String(left.get$name().get$name()), (($0 = left.get$name()) && $0.is$lang_Node()), (($0 = this.visitValue(init.y)) && $0.is$Value()), false);
-          this.writer.writeln(('' + assign.code + ';'));
+          var f = this.method.declaringType.getMember(left.get$name().get$name());
+          if ($notnull_bool(f == null)) {
+            world.error('bad initializer - no matching field', left.get$span());
+            continue;
+          }
+          else if ($notnull_bool(!$notnull_bool(f.get$isField()))) {
+            world.error(('"' + left.get$name().get$name() + '" does not refer to a field'), left.get$span());
+            continue;
+          }
+          initializedFields.add(f.get$name());
+          this.writer.writeln(('this.' + f.get$jsname() + ' = ' + this.visitValue(init.y).code + ';'));
         }
         else {
           world.error('invalid initializer', init.get$span());
@@ -12190,7 +12195,7 @@ MethodGenerator.prototype.visitNullExpression = function(node) {
 MethodGenerator.prototype.visitLiteralExpression = function(node) {
   var $0;
   var type = node.type.type;
-  $assert($ne(type, null), "type != null", "gen.dart", 2073, 12);
+  $assert($ne(type, null), "type != null", "gen.dart", 2081, 12);
   if ($notnull_bool(!!(($0 = node.value) && $0.is$List))) {
     var items = [];
     var $list = node.value;