Handle synthetic nodes use to throw exceptions

sdk/lib/_internal/js_runtime/lib/core_patch.dart

Index: sdk/lib/_internal/js_runtime/lib/core_patch.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/core_patch.dart b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
index 5c5ec252bc1ff4d717b52c53f636819e5f5d2beb..746e4372c0a7cb2678af9044651491587348435d 100644
--- a/sdk/lib/_internal/js_runtime/lib/core_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
@@ -20,7 +20,8 @@ import 'dart:_js_helper' show checkInt,
                               patch_startup,
                               Primitives,
                               stringJoinUnchecked,
-                              getTraceFromException;
+                              getTraceFromException,
+                              RuntimeError;
 
 import 'dart:_foreign_helper' show JS;
 
@@ -548,7 +549,7 @@ class StringBuffer {
 class NoSuchMethodError {
   @patch
   String toString() {
-    StringBuffer sb = new StringBuffer();
+    StringBuffer sb = new StringBuffer('');
     String comma = '';
     if (_arguments != null) {
       for (var argument in _arguments) {
@@ -558,6 +559,8 @@ class NoSuchMethodError {
       }
     }
     if (_namedArguments != null) {
+      // TODO(sra): Revert this form when kernel FunctionExpressions work.
+      /*
       _namedArguments.forEach((Symbol key, var value) {
         sb.write(comma);
         sb.write(_symbolToString(key));
@@ -565,6 +568,14 @@ class NoSuchMethodError {
         sb.write(Error.safeToString(value));
         comma = ', ';
       });
+      */
+      for (Symbol key in _namedArguments.keys) {
+        sb.write(comma);
+        sb.write(_symbolToString(key));
+        sb.write(": ");
+        sb.write(Error.safeToString(_namedArguments[key]));
+        comma = ', ';
+      }
     }
     String memberName = _symbolToString(_memberName);
     String receiverText = Error.safeToString(_receiver);
@@ -620,7 +631,7 @@ class _Uri {
 
     // Encode the string into bytes then generate an ASCII only string
     // by percent encoding selected bytes.
-    StringBuffer result = new StringBuffer();
+    StringBuffer result = new StringBuffer('');
     var bytes = encoding.encode(text);
     for (int i = 0; i < bytes.length; i++) {
       int byte = bytes[i];
@@ -667,3 +678,30 @@ class StackTrace {
     }
   }
 }
+
+// Called from kernel generated code.
+_genericNoSuchMethod(receiver, memberName, positionalArguments, namedArguments,
+    existingArguments) {
+  return new NoSuchMethodError(
+      receiver,
+      memberName,
+      positionalArguments,
+      namedArguments);
+}
+
+// Called from kernel generated code.
+_unresolvedConstructorError(receiver, memberName, positionalArguments,
+    namedArguments, existingArguments) {
+  // TODO(sra): Generate an error that reads:
+  //
+  //     No constructor '$memberName' declared in class '$receiver'.
+
+  return new NoSuchMethodError(
+      receiver,
+      memberName,
+      positionalArguments,
+      namedArguments);
+}
+
+// Called from kernel generated code.
+_malformedTypeError(message) => new RuntimeError(message);