dart2js cps: Handle error cases.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
index 8a99d4434bc7a5b26d8163c872ca3bb5263d7a1d..c330117d32beedb69c42ee101f8a1a2a91235291 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
@@ -373,6 +373,12 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     String value = access(node.value);
     return '(NonTailThrow $value)';
   }
+
+  String visitCreateInvocationMirror(CreateInvocationMirror node) {
+    String selector = node.selector.name;
+    String args = node.arguments.map(access).join(', ');
+    return '(CreateInvocationMirror $selector $args)';
+  }
 }
 
 class ConstantStringifier extends ConstantValueVisitor<String, Null> {