diff --git a/DEPS b/DEPS
index 70e73aa..48e6ed1 100644
--- a/DEPS
+++ b/DEPS
@@ -44,7 +44,7 @@
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd
   # has.
-  "co19_rev": "7a43aa19fb31db657b8b2dac2ed8a8af28889be3",
+  "co19_rev": "8740182c0547c1b26b79a5f96e28a0d5cd27b0c9",
   "co19_2_rev": "e48b3090826cf40b8037648f19d211e8eab1b4b6",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
diff --git a/pkg/analyzer/lib/src/summary2/package_bundle_reader.dart b/pkg/analyzer/lib/src/summary2/package_bundle_reader.dart
new file mode 100644
index 0000000..234ee2c
--- /dev/null
+++ b/pkg/analyzer/lib/src/summary2/package_bundle_reader.dart
@@ -0,0 +1,5 @@
+// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+export 'package:analyzer/src/summary/idl.dart' show PackageBundle;
diff --git a/tools/VERSION b/tools/VERSION
index 832de43..21097be 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 12
 PATCH 0
-PRERELEASE 79
+PRERELEASE 80
 PRERELEASE_PATCH 0
\ No newline at end of file