Fix for https://github.com/dart-lang/sdk/issues/28727

pkg/compiler/lib/src/js_emitter/class_stub_generator.dart

Index: pkg/compiler/lib/src/js_emitter/class_stub_generator.dart
diff --git a/pkg/compiler/lib/src/js_emitter/class_stub_generator.dart b/pkg/compiler/lib/src/js_emitter/class_stub_generator.dart
index 56ef69ee3adaa819b0dd0ba79baf057d9c6bae04..1388ba868ad1e9b1d7749d6e56d7edd3d70c439a 100644
--- a/pkg/compiler/lib/src/js_emitter/class_stub_generator.dart
+++ b/pkg/compiler/lib/src/js_emitter/class_stub_generator.dart
@@ -40,9 +40,8 @@ class ClassStubGenerator {
     var typeParameters = const <jsAst.Parameter>[];
     var typeInits = const <jsAst.Expression>[];
     if (hasRtiField) {
-      String parameterName = r'$ti';
-      typeParameters = parameterName;
-      typeInits = js('this.# = #', [namer.rtiFieldName, parameterName]);
+      typeParameters = namer.rtiFieldName;
+      typeInits = js('this.# = #', [namer.rtiFieldName, namer.rtiFieldName]);
     }
     return js('function(#, #) { #; #; this.#();}', [
       fields,