Change error handling.

dart_vm_standalone/rasta_errors.dart

Index: dart_vm_standalone/rasta_errors.dart
diff --git a/dart_vm_standalone/rasta_errors.dart b/dart_vm_standalone/rasta_errors.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4a23ce6fc45259e3f13bae9b39dc912afdbb33d6
--- /dev/null
+++ b/dart_vm_standalone/rasta_errors.dart
@@ -0,0 +1,29 @@
+library dart.core._rasta_errors;

[ahe, 2016/06/29 15:53:56]

Add copyright.

[asgerf, 2016/06/30 08:47:33]

Done.

+
+// RastaK generates calls to these methods -- all backends must provide them
+// in their patch for "dart:core".
+//
+// In the future, we could have a single `rasta_errors.dart` for all backends to
+// ensure consistent error messages across all backends.
+//
+// But for now, we just want errors that are consistent with the VM, so these
+// methods just reuse what is in the VM.
+
+_unresolvedConstructorError(
+    Object typeLiteral,
+    String fullConstructorName,
+    List arguments,
+    Map<Symbol, dynamic> namedArguments,
+    List existingArgumentNames) {
+  return new NoSuchMethodError._withType(
+      typeLiteral,
+      fullConstructorName,
+      _InvocationMirror._CONSTRUCTOR << _InvocationMirror._CALL_SHIFT,
+      arguments,
+      namedArguments,
+      existingArgumentNames);
+}
+
+_malformedTypeError(String errorMessage) {
+  return new _TypeError._create(null, null, null, errorMessage);
+}