Avoid crash on instantiation of classes with black-listed supertypes.

pkg/compiler/lib/src/ssa/builder.dart

Index: pkg/compiler/lib/src/ssa/builder.dart
diff --git a/pkg/compiler/lib/src/ssa/builder.dart b/pkg/compiler/lib/src/ssa/builder.dart
index fa63b186d09a16112248a4e0930a8c949e6ff93a..04f064cc73d0f677954650a1dd17cc0298605cb7 100644
--- a/pkg/compiler/lib/src/ssa/builder.dart
+++ b/pkg/compiler/lib/src/ssa/builder.dart
@@ -3414,7 +3414,8 @@ class SsaBuilder extends ast.Visitor
         constructorDeclaration.computeEffectiveTargetType(type);
     expectedType = localsHandler.substInContext(expectedType);
 
-    if (compiler.elementHasCompileTimeError(constructor)) {
+    if (compiler.elementHasCompileTimeError(constructor) ||
+        compiler.elementHasCompileTimeError(constructor.enclosingClass)) {
       // TODO(ahe): Do something like [generateWrongArgumentCountError].
       stack.add(graph.addConstantNull(closedWorld));
       return;