Opt pkg/dev_compiler out of null safety.

Change-Id: I62207a436605480b6981b8b00bf7b88d8589db0f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/166980
Commit-Queue: Leaf Petersen <leafp@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>

pkg/dev_compiler/bin/dartdevc.dart

@@ -3,6 +3,8 @@
 // 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.
 
+// @dart = 2.9
+
 /// Command line entry point for Dart Development Compiler (dartdevc), used to
 /// compile a collection of dart libraries into a single JS module
 

pkg/dev_compiler/lib/dev_compiler.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // The dev_compiler does not have a publishable public API, instead this is
 // intended for other consumers within the Dart SDK.
 export 'src/compiler/module_builder.dart' show ModuleFormat, parseModuleFormat;

pkg/dev_compiler/lib/src/compiler/js_metalet.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // TODO(jmesserly): import from its own package
 import '../js_ast/js_ast.dart';
 import 'js_names.dart' show TemporaryId;

pkg/dev_compiler/lib/src/compiler/js_names.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 
 import '../js_ast/js_ast.dart';

pkg/dev_compiler/lib/src/compiler/js_typerep.dart

@@ -1,4 +1,7 @@
 /// An abstraction of the JS types
+
+// @dart = 2.9
+
 abstract class JSType {
   const JSType();
 

pkg/dev_compiler/lib/src/compiler/js_utils.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import '../js_ast/js_ast.dart';
 
 /// Simplify `(args) => (() => { ... })()` to `(args) => { ... }`.

pkg/dev_compiler/lib/src/compiler/module_builder.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'package:args/args.dart' show ArgParser, ArgResults;
 import 'package:dev_compiler/src/compiler/shared_compiler.dart';
 import 'package:path/path.dart' as p;

pkg/dev_compiler/lib/src/compiler/shared_command.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:io';
 

pkg/dev_compiler/lib/src/compiler/shared_compiler.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'package:meta/meta.dart';
 

pkg/dev_compiler/lib/src/js_ast/builder.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: slash_for_doc_comments, unnecessary_new
 // ignore_for_file: always_declare_return_types, prefer_single_quotes
 // ignore_for_file: prefer_collection_literals, omit_local_variable_types

pkg/dev_compiler/lib/src/js_ast/characters.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 const int $EOF = 0;
 const int $STX = 2;
 const int $BS = 8;

pkg/dev_compiler/lib/src/js_ast/js_ast.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: directives_ordering
 
 library js_ast;

pkg/dev_compiler/lib/src/js_ast/nodes.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: slash_for_doc_comments, prefer_single_quotes
 // ignore_for_file: always_declare_return_types, prefer_final_fields
 // ignore_for_file: always_require_non_null_named_parameters

pkg/dev_compiler/lib/src/js_ast/precedence.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 const EXPRESSION = 0;
 // TODO(nshahan) No longer used for the spread operator.
 // All precedence levels need to be updated to be more accurate.

pkg/dev_compiler/lib/src/js_ast/printer.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: slash_for_doc_comments, unnecessary_const
 // ignore_for_file: always_declare_return_types, prefer_single_quotes
 // ignore_for_file: prefer_collection_literals, omit_local_variable_types

pkg/dev_compiler/lib/src/js_ast/source_map_printer.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: always_declare_return_types, omit_local_variable_types
 
 import 'package:source_maps/source_maps.dart' hide Printer;

pkg/dev_compiler/lib/src/js_ast/template.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 // ignore_for_file: slash_for_doc_comments, omit_local_variable_types
 // ignore_for_file: always_declare_return_types, prefer_collection_literals
 // ignore_for_file: prefer_single_quotes, prefer_generic_function_type_aliases

pkg/dev_compiler/lib/src/kernel/command.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:convert' show json;
 import 'dart:io';

pkg/dev_compiler/lib/src/kernel/compiler.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:math' show max, min;

pkg/dev_compiler/lib/src/kernel/constants.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'package:kernel/kernel.dart';
 import 'package:kernel/target/targets.dart';
 

pkg/dev_compiler/lib/src/kernel/expression_compiler.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 
 import 'package:_fe_analyzer_shared/src/messages/diagnostic_message.dart'

pkg/dev_compiler/lib/src/kernel/expression_compiler_worker.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';

pkg/dev_compiler/lib/src/kernel/js_interop.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'package:kernel/kernel.dart';
 import 'kernel_helpers.dart';
 

pkg/dev_compiler/lib/src/kernel/js_typerep.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'package:kernel/class_hierarchy.dart';
 import 'package:kernel/core_types.dart';
 import 'package:kernel/kernel.dart';

pkg/dev_compiler/lib/src/kernel/kernel_helpers.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'package:front_end/src/api_unstable/ddc.dart';
 import 'package:kernel/core_types.dart';

pkg/dev_compiler/lib/src/kernel/module_metadata.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /// Module metadata format version
 ///
 /// Module reader always creates the current version but is able to read

pkg/dev_compiler/lib/src/kernel/native_types.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'package:kernel/core_types.dart';
 import 'package:kernel/kernel.dart';

pkg/dev_compiler/lib/src/kernel/nullable_inference.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'package:kernel/core_types.dart';
 import 'package:kernel/kernel.dart';

pkg/dev_compiler/lib/src/kernel/property_model.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection' show HashMap, HashSet, Queue;
 
 import 'package:kernel/core_types.dart';

pkg/dev_compiler/lib/src/kernel/target.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import 'dart:core' hide MapEntry;
 

pkg/dev_compiler/lib/src/kernel/type_table.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'package:kernel/kernel.dart';
 
 import '../compiler/js_names.dart' as js_ast;

pkg/dev_compiler/test/expression_compiler/expression_compiler_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:io' show Directory, File;
 
 import 'package:cli_util/cli_util.dart';

pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io' show Directory, File, Platform, Process, stderr, stdout;

pkg/dev_compiler/test/js/builder_test.dart

@@ -1,3 +1,5 @@
+// @dart = 2.9
+
 import 'package:dev_compiler/src/js_ast/js_ast.dart';
 import 'package:test/test.dart';
 

pkg/dev_compiler/test/modular_suite.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /// Test the modular compilation pipeline of ddc.
 ///
 /// This is a shell that runs multiple tests, one per folder under `data/`.

pkg/dev_compiler/test/modular_suite_nnbd.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /// Test the modular compilation pipeline of ddc.
 ///
 /// This is a shell that runs multiple tests, one per folder under `data/`.

pkg/dev_compiler/test/module_metadata_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:convert';
 import 'dart:io';
 

pkg/dev_compiler/test/nullable_inference_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:io';
 import 'package:front_end/src/api_unstable/ddc.dart' as fe;

pkg/dev_compiler/test/sdk_source_map_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:io';
 
 import 'package:expect/expect.dart';

pkg/dev_compiler/test/sourcemap/common.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async' show Future;
 
 import 'dart:io';

pkg/dev_compiler/test/sourcemap/ddc_common.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 library dev_compiler.test.sourcemap.ddc_common;
 
 import 'dart:io';

pkg/dev_compiler/test/sourcemap/sourcemaps_ddk_suite.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:io';
 

pkg/dev_compiler/test/sourcemap/stacktrace_ddk_suite.dart

@@ -1,3 +1,5 @@
+// @dart = 2.9
+
 import 'package:front_end/src/api_unstable/ddc.dart' as fe;
 import 'package:testing/testing.dart';
 

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/null_instance_field.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test(Class());
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/null_interceptor_field.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 class MyType {
   int get length => 3; // ensures we build an interceptor for `.length`
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/rethrow.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_async.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_awaited_async.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test1();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_constructor.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   // ignore: UNUSED_LOCAL_VARIABLE
   var /*ddc.1:main*/ c = /*ddk.1:main*/ Class();

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_constructor_from_async.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   // This call is no longer on the stack when the error is thrown.
   /*1:main*/ test();

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_instance_method.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   var c = Class();
   c. /*1:main*/ test();

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_main.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ throw '>ExceptionMarker<';
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_static_method.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*ddc.1:main*/ Class. /*ddk.1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_top_level_method.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_top_level_method_from_async.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test1();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_try_catch.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/stacktrace_testfiles/throw_in_try_finally.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*1:main*/ test();
 }

pkg/dev_compiler/test/sourcemap/testfiles/breakpoint_on_function_line_breaks_in_body.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   foo();
 }

pkg/dev_compiler/test/sourcemap/testfiles/call_on_field_in_class.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /* bl */ var foo = /*sl:1*/ Foo();
   foo.foo = foo. /*sl:2*/ fooMethod;

pkg/dev_compiler/test/sourcemap/testfiles/hello_async.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*bl*/
   /*s:1*/ foo();

pkg/dev_compiler/test/sourcemap/testfiles/hello_call.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*bl*/
   /*s:1*/ foo();

pkg/dev_compiler/test/sourcemap/testfiles/hello_class_call.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*bl*/
   var foo = Foo();

pkg/dev_compiler/test/sourcemap/testfiles/hello_sane_column_on_print_return_value.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*bc:3*/ print(/*bc:1*/ foo());
 }

pkg/dev_compiler/test/sourcemap/testfiles/hello_world.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /*nb*/ // no break on empty line
   /*bl*/ print('Hello, World!');

pkg/dev_compiler/test/sourcemap/testfiles/method_call_with_named_parameters.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   foo(/*bc:1*/ bar(), baz: /*bc:2*/ baz());
   /*nbb:0:4*/

pkg/dev_compiler/test/sourcemap/testfiles/method_call_with_named_parameters_no_given.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   foo(/*bc:1*/ bar());
   /*nbb:0:3*/

pkg/dev_compiler/test/sourcemap/testfiles/next_through_assert.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   assert(/*bc:1*/ foo());

pkg/dev_compiler/test/sourcemap/testfiles/next_through_assign_call_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   /*nb*/ int a;

pkg/dev_compiler/test/sourcemap/testfiles/next_through_assign_int_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   /*nb*/ int a;

pkg/dev_compiler/test/sourcemap/testfiles/next_through_catch_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_for_each_loop_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   /*bl*/ /*sl:1*/ var data = [1, 2, 3];

pkg/dev_compiler/test/sourcemap/testfiles/next_through_for_loop_with_break_and_continue_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   /*bl*/ /*sl:1*/ var count = 0;

pkg/dev_compiler/test/sourcemap/testfiles/next_through_is_and_as_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_map_creation.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_multi_catch_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_operator_bracket_on_super_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 class Class2 {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_operator_bracket_on_this_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 class Class2 {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_operator_bracket_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 class Class2 {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_static_set.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 var bar = 0;

pkg/dev_compiler/test/sourcemap/testfiles/next_through_string_concatenation.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_string_plus.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_throw.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_variable_set.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/next_through_yield.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/no_mapping_on_class_constructor_line.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   // ignore: unused_local_variable
   var foo = Foo();

pkg/dev_compiler/test/sourcemap/testfiles/no_mapping_on_class_function_line.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   var foo = Foo();
   foo.foo();

pkg/dev_compiler/test/sourcemap/testfiles/no_mapping_on_class_line.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   var foo = Foo();
   foo.foo();

pkg/dev_compiler/test/sourcemap/testfiles/no_mapping_on_class_named_constructor_line.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   // ignore: unused_local_variable
   var foo = Foo.named();

pkg/dev_compiler/test/sourcemap/testfiles/no_mapping_on_function_line.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*nm*/
 void main() {
   foo();

pkg/dev_compiler/test/sourcemap/testfiles/printing_class_fields.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 void main() {
   /*bl*/

pkg/dev_compiler/test/sourcemap/testfiles/printing_class_fields_step_into.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*nb*/
 void main() {
   /*bl*/

pkg/dev_compiler/test/sourcemap/testfiles/step_through_async_star_yield.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() async {
   await for (var i in foobar()) {
     print(i);

pkg/dev_compiler/test/sourcemap/testfiles/step_through_await_for.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() async {
   /* bl */
   /*sl:1 */ print('About to loop!');

pkg/dev_compiler/test/sourcemap/testfiles/step_through_conditional_expression.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/step_through_if_and_identical.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 /*Debugger:stepOver*/
 
 void main() {

pkg/dev_compiler/test/sourcemap/testfiles/step_through_property_get_test.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   var bar = Bar();
   bar.doStuff();

pkg/dev_compiler/test/sourcemap/testfiles/step_through_sync_star.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   /* bl */
   /*sl:1*/ var iterator = naturalsTo(2);

pkg/dev_compiler/test/sourcemap/testfiles/stops_at_ending_brace.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 void main() {
   Foo();
   // Comment to push the ending brace back a bit.

pkg/dev_compiler/test/string_to_uri_test.dart

@@ -1,3 +1,5 @@
+// @dart = 2.9
+
 import 'dart:io';
 import 'package:dev_compiler/src/compiler/shared_command.dart';
 import 'package:test/test.dart';

pkg/dev_compiler/test/testing.dart

@@ -2,6 +2,8 @@
 // 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.
 
+// @dart = 2.9
+
 library dev_compiler.src.testing;
 
 import 'dart:mirrors';