Fix a bug in dart2js's shrinking reductions.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 5340434ec4ca59e3e8114835d4af9b41a8ea666c..db093f9c26ab09a7ae0cb4d19223edadd5a53fbc 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -191,7 +191,7 @@ analyzer/test/src/util/asserts_test: Crash # (try {test(spec,body);}finally {env
 analyzer/test/src/util/lru_map_test: Crash # (try {test(spec,body);}finally {environment.soloNestingLevel-- ;}): try/finally
 fixnum/test/int_32_test: Crash # (try {body();}catch ...  try/finally
 fixnum/test/int_64_test: Crash # (try {body();}catch ...  try/finally
-js_ast/test/printer_callback_test: Crash # The null object does not have a getter 'namedArguments'.
+js_ast/test/printer_callback_test: Crash # Issue 23691
 microlytics/test/dart_microlytics_test: RuntimeError # Please triage this failure.
 typed_data/test/typed_buffers_test/01: Crash # Invalid argument(s)
 typed_data/test/typed_buffers_test/none: Crash # Invalid argument(s)