diff --git a/tests/language_2/language_2.status b/tests/language_2/language_2.status
index b55da224c84..1366be977f5 100644
--- a/tests/language_2/language_2.status
+++ b/tests/language_2/language_2.status
@@ -58,6 +58,8 @@ issue_22780_test/01: Pass, Crash # Issue 29094
 issue_1751477_test: Crash # Requires deferred libraries
 vm/regress_27201_test: Pass, Crash # Requires deferred libraries
 vm/optimized_stacktrace_test: Pass, Slow
+regress_23408_test: Crash # Requires deferred libraries
+regress_22443_test: Crash # Requires deferred libraries
 
 [ $checked && ! $strong ]
 type_parameter_test/05: Pass
diff --git a/tests/language_2/language_2_analyzer.status b/tests/language_2/language_2_analyzer.status
index 49355080152..f429f893f0b 100644
--- a/tests/language_2/language_2_analyzer.status
+++ b/tests/language_2/language_2_analyzer.status
@@ -803,6 +803,8 @@ private_member1_negative_test: fail # Issue 14021
 private_member2_negative_test: fail # Issue 14021
 private_member3_negative_test: fail # Issue 14021
 prefix7_negative_test: CompileTimeError
+regress_27617_test/1: MissingCompileTimeError
+regress_23408_test: Skip # don't care about the static warning.
 
 [ $strong && $compiler == dart2analyzer ]
 accessor_conflict_export2_test: CompileTimeError # Issue 25626
@@ -1089,6 +1091,10 @@ prefix16_test/01: MissingCompileTimeError
 prefix18_negative_test: CompileTimeError, OK
 prefix22_test/00: MissingCompileTimeError
 prefix23_test/00: MissingCompileTimeError
+regress_22936_test: MissingCompileTimeError
+regress_23089_test: MissingCompileTimeError
+regress_26133_test: MissingCompileTimeError
+regress_27572_test: MissingCompileTimeError
 string_interpolation_test/01: MissingCompileTimeError
 string_no_operator_test/01: MissingCompileTimeError
 string_no_operator_test/02: MissingCompileTimeError
diff --git a/tests/language_2/language_2_dart2js.status b/tests/language_2/language_2_dart2js.status
index 4c1c93576b7..91855648471 100644
--- a/tests/language_2/language_2_dart2js.status
+++ b/tests/language_2/language_2_dart2js.status
@@ -447,6 +447,11 @@ override_inheritance_no_such_method_test/12: MissingCompileTimeError
 override_inheritance_no_such_method_test/13: MissingCompileTimeError
 override_method_with_field_test/02: MissingCompileTimeError
 part2_test/01: MissingCompileTimeError
+regress_26133_test: MissingCompileTimeError
+regress_22936_test: MissingCompileTimeError
+regress_23089_test: MissingCompileTimeError
+regress_23408_test: RuntimeError
+regress_27572_test: MissingCompileTimeError
 static_field3_test/01: MissingCompileTimeError
 static_field3_test/02: MissingCompileTimeError
 static_field3_test/03: MissingCompileTimeError
@@ -714,6 +719,8 @@ list_literal4_test/05: MissingCompileTimeError
 list_literal_syntax_test/01: MissingCompileTimeError
 list_literal_syntax_test/02: MissingCompileTimeError
 list_literal_syntax_test/03: MissingCompileTimeError
+regress_22976_test: CompileTimeError # Issue 23132
+regress_24283_test: RuntimeError # Issue 1533
 external_test/10: CompileTimeError # Issue 12887
 external_test/13: CompileTimeError # Issue 12887
 external_test/20: CompileTimeError # Issue 12887
@@ -1189,6 +1196,18 @@ external_test/10: MissingRuntimeError
 external_test/13: MissingRuntimeError
 external_test/20: MissingRuntimeError
 factory_redirection_test/07: MissingCompileTimeError
+regress_22443_test: CompileTimeError
+regress_22976_test/01: CompileTimeError
+regress_22976_test/02: CompileTimeError
+regress_22976_test/none: CompileTimeError
+regress_23408_test: CompileTimeError
+regress_23996_test: RuntimeError
+regress_24283_test: RuntimeError
+regress_27572_test: RuntimeError
+regress_27617_test/1: Crash # Assertion failure: Unexpected constructor j:constructor(Foo._) in ConstructorDataImpl._getConstructorConstant
+regress_28217_test/01: MissingCompileTimeError
+regress_28217_test/none: MissingCompileTimeError
+regress_28255_test: RuntimeError
 
 [ $compiler == dart2js && $dart2js_with_kernel && $minified ]
 assertion_initializer_const_error2_test/none: CompileTimeError
@@ -1493,6 +1512,16 @@ external_test/20: MissingRuntimeError
 f_bounded_quantification4_test: RuntimeError
 f_bounded_quantification5_test: RuntimeError
 factory_redirection_test/07: MissingCompileTimeError
+regress_22443_test: CompileTimeError
+regress_22976_test: CompileTimeError
+regress_23408_test: CompileTimeError
+regress_23996_test: RuntimeError
+regress_24283_test: RuntimeError, OK # Requires 64 bit numbers.
+regress_27572_test: RuntimeError
+regress_27617_test/1: Crash # Assertion failure: Unexpected constructor j:constructor(Foo._) in ConstructorDataImpl._getConstructorConstant
+regress_28217_test/01: MissingCompileTimeError
+regress_28217_test/none: MissingCompileTimeError
+regress_28255_test: RuntimeError
 
 [ $compiler == dart2js && $dart2js_with_kernel && $minified && $checked ]
 inline_super_field_test: Crash
@@ -1509,6 +1538,7 @@ async_star_await_pauses_test: RuntimeError # Need triage
 async_star_no_cancel2_test: RuntimeError # Need triage
 async_star_no_cancel_test: RuntimeError # Need triage
 await_for_test: Skip # Jsshell does not provide periodic timers, Issue 7728
+regress_23996_test: RuntimeError # Jsshell does not provide non-zero timers, Issue 7728
 
 [ $compiler == dart2js && $runtime == jsshell ]
 async_star_test/01: RuntimeError
@@ -1523,6 +1553,7 @@ async_return_types_test/nestedFuture: Fail # Issue 26429
 async_return_types_test/wrongTypeParameter: Fail # Issue 26429
 covariant_subtyping_test: CompileTimeError
 default_factory2_test/01: Fail # Issue 14121
+regress_26133_test: RuntimeError # Issue 26429
 
 [ $compiler == dart2js && !$checked && !$dart2js_with_kernel ]
 bool_check_test: RuntimeError # Issue 29647
@@ -1555,6 +1586,7 @@ null_test/0*: Pass # mirrors not supported, fails for the wrong reason
 null_test/none: Fail # mirrors not supported
 overridden_no_such_method_test: Fail # mirrors not supported
 vm/reflect_core_vm_test: Fail # mirrors not supported
+regress_28255_test: Fail # mirrors not supported
 
 [ $compiler == dart2js && $runtime == chrome && $system == macos && !$dart2js_with_kernel ]
 await_future_test: Pass, Timeout # Issue 26735
@@ -1592,3 +1624,9 @@ round_test: Pass, Fail, OK # Fixed in ff 35. Common JavaScript engine Math.round
 [ $compiler == dart2js && $minified && ! $dart2js_with_kernel ]
 f_bounded_quantification4_test: Fail, Pass # Issue 12605
 symbol_conflict_test: RuntimeError # Issue 23857
+
+[ $compiler == dart2js && $host_checked && !$dart2js_with_kernel ]
+regress_26855_test/1: Crash # Issue 26867
+regress_26855_test/2: Crash # Issue 26867
+regress_26855_test/3: Crash # Issue 26867
+regress_26855_test/4: Crash # Issue 26867
diff --git a/tests/language_2/language_2_dartdevc.status b/tests/language_2/language_2_dartdevc.status
index 4d53144c8d7..555c16650be 100644
--- a/tests/language_2/language_2_dartdevc.status
+++ b/tests/language_2/language_2_dartdevc.status
@@ -102,6 +102,11 @@ parameter_initializer_test: CompileTimeError
 parser_quirks_test: CompileTimeError
 part_refers_to_core_library_test/01: Crash
 export_private_test/01: MissingCompileTimeError # Issue 29920
+regress_22443_test: RuntimeError
+regress_24283_test: RuntimeError, OK # Requires 64 bit numbers.
+regress_23408_test: CompileTimeError
+regress_25568_test: RuntimeError
+regress_27617_test/1: MissingCompileTimeError
 
 [ $strong && $compiler == dartdevc ]
 accessor_conflict_export2_test: CompileTimeError # Issue 25626
diff --git a/tests/language_2/language_2_flutter.status b/tests/language_2/language_2_flutter.status
index 703e6d6257d..47c2689e450 100644
--- a/tests/language_2/language_2_flutter.status
+++ b/tests/language_2/language_2_flutter.status
@@ -274,6 +274,8 @@ wrong_number_type_arguments_test/01: CompileTimeError
 wrong_number_type_arguments_test/02: CompileTimeError
 new_expression_type_args_test/02: CompileTimeError
 no_such_method_test: CompileTimeError
+regress_28255_test: CompileTimeError
+regress_23408_test: CompileTimeError
 private_access_test/03: CompileTimeError
 private_access_test/04: CompileTimeError
 list_literal_syntax_test/03: CompileTimeError
diff --git a/tests/language_2/language_2_kernel.status b/tests/language_2/language_2_kernel.status
index f2bcb05ddb7..f5b3badc93d 100644
--- a/tests/language_2/language_2_kernel.status
+++ b/tests/language_2/language_2_kernel.status
@@ -250,6 +250,8 @@ map_literal1_test/01: MissingCompileTimeError
 type_parameter_test/05: MissingCompileTimeError
 type_parameter_test/none: RuntimeError
 type_variable_bounds4_test/01: RuntimeError
+regress_22728_test: RuntimeError
+regress_26133_test: RuntimeError
 factory_redirection_test/08: Fail
 factory_redirection_test/09: Fail
 factory_redirection_test/10: Fail
@@ -426,6 +428,11 @@ external_test/10: MissingRuntimeError # KernelVM bug: Unbound external.
 external_test/13: MissingRuntimeError # KernelVM bug: Unbound external.
 external_test/20: MissingRuntimeError # KernelVM bug: Unbound external.
 factory_redirection_test/07: MissingCompileTimeError # Fasta bug: Bad constructor redirection.
+regress_22443_test: CompileTimeError # Fasta/KernelVM bug: Deferred loading kernel issue 28335.
+regress_23408_test: CompileTimeError # Fasta/KernelVM bug: Deferred loading kernel issue 28335.
+regress_27617_test/1: MissingCompileTimeError # Fasta bug: Bad constructor redirection.
+regress_28217_test/01: MissingCompileTimeError # Fasta bug: Bad constructor redirection.
+regress_28217_test/none: MissingCompileTimeError # Fasta bug: Bad constructor redirection.
 
 [ $checked && ($compiler == dartk || $compiler == dartkp) ]
 assign_static_type_test/02: MissingCompileTimeError
@@ -504,5 +511,8 @@ deopt_inlined_function_lazy_test: Skip
 [ $compiler == dartkp || $compiler == dartk ]
 async_star_test/01: Pass
 
+[ ($compiler == dartk || $compiler == dartkp) && $checked ]
+regress_22728_test: Fail # Dartk Issue 28498
+
 [ $compiler == dartkp && $mode == debug ]
 external_test/13: Crash
diff --git a/tests/language_2/language_2_precompiled.status b/tests/language_2/language_2_precompiled.status
index 944b7ef5d80..2c8ef145d15 100644
--- a/tests/language_2/language_2_precompiled.status
+++ b/tests/language_2/language_2_precompiled.status
@@ -429,6 +429,10 @@ prefix16_test/00: MissingCompileTimeError
 prefix16_test/01: MissingCompileTimeError
 prefix22_test/00: MissingCompileTimeError
 prefix23_test/00: MissingCompileTimeError
+regress_22936_test: MissingCompileTimeError
+regress_23089_test: MissingCompileTimeError
+regress_27572_test: MissingCompileTimeError
+regress_26133_test: MissingCompileTimeError
 static_field3_test/01: MissingCompileTimeError
 static_field3_test/02: MissingCompileTimeError
 static_field3_test/03: MissingCompileTimeError
@@ -574,6 +578,7 @@ void_block_return_test/00: MissingCompileTimeError
 void_block_return_test/00: MissingCompileTimeError
 wrong_number_type_arguments_test/*: MissingCompileTimeError
 library_env_test/has_mirror_support: RuntimeError, OK
+regress_28255_test: SkipByDesign
 export_ambiguous_main_test: Crash
 f_bounded_quantification_test/01: MissingCompileTimeError
 f_bounded_quantification_test/02: MissingCompileTimeError
@@ -744,6 +749,7 @@ deferred_global_test: Fail
 deopt_inlined_function_lazy_test: Skip # Incompatible flag: --deoptimize-alot
 implicit_closure_test: Skip # Incompatible flag: --use_slow_path
 vm/regress_27201_test: Fail
+regress_23408_test: RuntimeError
 
 [ $mode == product || $compiler == app_jit || $compiler == precompiler ]
 deferred_load_constants_test/02: Fail
diff --git a/tests/language_2/language_2_vm.status b/tests/language_2/language_2_vm.status
index aeb1a25a253..38d630e9a6f 100644
--- a/tests/language_2/language_2_vm.status
+++ b/tests/language_2/language_2_vm.status
@@ -415,6 +415,11 @@ prefix16_test/00: MissingCompileTimeError
 prefix16_test/01: MissingCompileTimeError
 prefix22_test/00: MissingCompileTimeError
 prefix23_test/00: MissingCompileTimeError
+regress_22936_test: MissingCompileTimeError
+regress_23089_test: MissingCompileTimeError
+regress_23408_test: RuntimeError
+regress_27572_test: MissingCompileTimeError
+regress_26133_test: MissingCompileTimeError
 static_field3_test/01: MissingCompileTimeError
 static_field3_test/02: MissingCompileTimeError
 static_field3_test/03: MissingCompileTimeError
@@ -814,6 +819,7 @@ type_parameter_test/05: MissingCompileTimeError
 [ $compiler == app_jit && $runtime == vm ]
 generic_methods_reuse_type_variables_test: RuntimeError
 type_parameter_test/05: MissingCompileTimeError
+regress_23408_test: Crash
 
 [ $compiler == app_jit && $runtime == vm && !$checked ]
 assertion_initializer_const_error2_test/cc02: MissingCompileTimeError
diff --git a/tests/language_strong/regress_22443_lib.dart b/tests/language_2/regress_22443_lib.dart
similarity index 100%
rename from tests/language_strong/regress_22443_lib.dart
rename to tests/language_2/regress_22443_lib.dart
diff --git a/tests/language_strong/regress_22443_test.dart b/tests/language_2/regress_22443_test.dart
similarity index 99%
rename from tests/language_strong/regress_22443_test.dart
rename to tests/language_2/regress_22443_test.dart
index bb4abd25f5e..d3fbe9ca638 100644
--- a/tests/language_strong/regress_22443_test.dart
+++ b/tests/language_2/regress_22443_test.dart
@@ -19,7 +19,6 @@ main() {
   } catch (e) {
     caughtIt = true;
   }
-  ;
   D.loadLibrary().then((_) {
     foo();
     Expect.isTrue(caughtIt);
diff --git a/tests/language_strong/regress_22445_test.dart b/tests/language_2/regress_22445_test.dart
similarity index 100%
rename from tests/language_strong/regress_22445_test.dart
rename to tests/language_2/regress_22445_test.dart
diff --git a/tests/language_strong/regress_22579_test.dart b/tests/language_2/regress_22579_test.dart
similarity index 100%
rename from tests/language_strong/regress_22579_test.dart
rename to tests/language_2/regress_22579_test.dart
diff --git a/tests/language_strong/regress_22666_test.dart b/tests/language_2/regress_22666_test.dart
similarity index 100%
rename from tests/language_strong/regress_22666_test.dart
rename to tests/language_2/regress_22666_test.dart
diff --git a/tests/language_strong/regress_22700_test.dart b/tests/language_2/regress_22700_test.dart
similarity index 100%
rename from tests/language_strong/regress_22700_test.dart
rename to tests/language_2/regress_22700_test.dart
diff --git a/tests/language_strong/regress_22719_test.dart b/tests/language_2/regress_22719_test.dart
similarity index 100%
rename from tests/language_strong/regress_22719_test.dart
rename to tests/language_2/regress_22719_test.dart
diff --git a/tests/language_strong/regress_22728_test.dart b/tests/language_2/regress_22728_test.dart
similarity index 100%
rename from tests/language_strong/regress_22728_test.dart
rename to tests/language_2/regress_22728_test.dart
diff --git a/tests/language_strong/regress_22777_test.dart b/tests/language_2/regress_22777_test.dart
similarity index 100%
rename from tests/language_strong/regress_22777_test.dart
rename to tests/language_2/regress_22777_test.dart
diff --git a/tests/language_strong/regress_22822_test.dart b/tests/language_2/regress_22822_test.dart
similarity index 100%
rename from tests/language_strong/regress_22822_test.dart
rename to tests/language_2/regress_22822_test.dart
diff --git a/tests/language_strong/regress_22858_test.dart b/tests/language_2/regress_22858_test.dart
similarity index 100%
rename from tests/language_strong/regress_22858_test.dart
rename to tests/language_2/regress_22858_test.dart
diff --git a/tests/language_strong/regress_22936_test.dart b/tests/language_2/regress_22936_test.dart
similarity index 89%
rename from tests/language_strong/regress_22936_test.dart
rename to tests/language_2/regress_22936_test.dart
index 700e1333b1a..878e7c41913 100644
--- a/tests/language_strong/regress_22936_test.dart
+++ b/tests/language_2/regress_22936_test.dart
@@ -16,8 +16,7 @@ foo() {
 main() {
   final x = null;
   try {
-    x = //   //# 01: static type warning
-    foo();
+    x = /*@compile-error=unspecified*/ foo();
   } on NoSuchMethodError {}
   Expect.isTrue(fooCalled);
 }
diff --git a/tests/language_strong/regress_22976_test.dart b/tests/language_2/regress_22976_test.dart
similarity index 70%
rename from tests/language_strong/regress_22976_test.dart
rename to tests/language_2/regress_22976_test.dart
index 14d2d3a1495..d64ef30000c 100644
--- a/tests/language_strong/regress_22976_test.dart
+++ b/tests/language_2/regress_22976_test.dart
@@ -11,6 +11,8 @@ class B<T> implements A<T> {}
 class C<S, T> implements B<S>, A<T> {}
 
 main() {
-  A<int> a0 = new C<int, String>(); //# 01: ok
-  A<int> a1 = new C<String, int>(); //# 02: ok
+  C<int, String> c1 = new C<int, String>();
+  C<String, int> c2 = new C<String, int>();
+  A<int> a0 = c1; //# 01: ok
+  A<int> a1 = c2; //# 02: ok
 }
diff --git a/tests/language_strong/regress_23038_test.dart b/tests/language_2/regress_23038_test.dart
similarity index 100%
rename from tests/language_strong/regress_23038_test.dart
rename to tests/language_2/regress_23038_test.dart
diff --git a/tests/language_strong/regress_23046_test.dart b/tests/language_2/regress_23046_test.dart
similarity index 100%
rename from tests/language_strong/regress_23046_test.dart
rename to tests/language_2/regress_23046_test.dart
diff --git a/tests/language_strong/regress_23051_test.dart b/tests/language_2/regress_23051_test.dart
similarity index 80%
rename from tests/language_strong/regress_23051_test.dart
rename to tests/language_2/regress_23051_test.dart
index 2c340081b4c..58ac140f6a3 100644
--- a/tests/language_strong/regress_23051_test.dart
+++ b/tests/language_2/regress_23051_test.dart
@@ -9,7 +9,7 @@ main() {
 }
 
 class A { //                                 //# 01: continued
-  // Note the trailing ' in the next line. //# 01: continued
+  // Note the trailing ' in the next line.   //# 01: continued
   get foo => bar();' //                      //# 01: continued
-/// 01: continued
+  //                                         //# 01: continued
   String bar( //                             //# 01: continued
diff --git a/tests/language_strong/regress_23089_test.dart b/tests/language_2/regress_23089_test.dart
similarity index 71%
rename from tests/language_strong/regress_23089_test.dart
rename to tests/language_2/regress_23089_test.dart
index 4ee11bcec2e..2718475177d 100644
--- a/tests/language_strong/regress_23089_test.dart
+++ b/tests/language_2/regress_23089_test.dart
@@ -2,7 +2,11 @@
 // 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.
 
-abstract class IPeer<C extends IP2PClient> {}
+// Test doesn't cover http://dartbug.com/23089 anymore.
+// Generic bounds now must be fully instantiated. This means that the
+// cycle is not possible anymore.
+
+abstract class IPeer<C extends IP2PClient /*@compile-error=unspecified*/ > {}
 
 abstract class IPeerRoom<P extends IPeer, C extends IP2PClient> {}
 
diff --git a/tests/language_strong/regress_23408_lib.dart b/tests/language_2/regress_23408_lib.dart
similarity index 100%
rename from tests/language_strong/regress_23408_lib.dart
rename to tests/language_2/regress_23408_lib.dart
diff --git a/tests/language_strong/regress_23408_test.dart b/tests/language_2/regress_23408_test.dart
similarity index 72%
rename from tests/language_strong/regress_23408_test.dart
rename to tests/language_2/regress_23408_test.dart
index f47f1cb9503..4372b543453 100644
--- a/tests/language_strong/regress_23408_test.dart
+++ b/tests/language_2/regress_23408_test.dart
@@ -2,6 +2,9 @@
 // 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.
 
+// This test has been modified: it is now ok to use deferred types as long as
+// they aren't instantiated.
+
 library regress_23408_test;
 
 import 'package:expect/expect.dart';
@@ -9,7 +12,7 @@ import 'package:expect/expect.dart';
 import 'regress_23408_lib.dart' deferred as lib;
 
 class A<T> extends C {
-  get t => "$T";
+  get t => T;
 }
 
 class C {
@@ -20,12 +23,12 @@ class C {
 }
 
 void main() {
-  var a = new C.l(); // Redirects to A<dynamic>
-  Expect.equals("dynamic", a.t);
+  var a = new C.l();
+  Expect.equals(lib.K, a.t);
   Expect.throws(() => new C.c());
   lib.loadLibrary().then((_) {
-    var b = new C.l(); // Still redirects to A<dynamic>
-    Expect.equals("dynamic", b.t);
+    var b = new C.l();
+    Expect.equals(lib.K, b.t);
     var z = new C.c();
     Expect.equals(55, z.v);
   });
diff --git a/tests/language_strong/regress_23498_test.dart b/tests/language_2/regress_23498_test.dart
similarity index 100%
rename from tests/language_strong/regress_23498_test.dart
rename to tests/language_2/regress_23498_test.dart
diff --git a/tests/language_strong/regress_23500_test.dart b/tests/language_2/regress_23500_test.dart
similarity index 100%
rename from tests/language_strong/regress_23500_test.dart
rename to tests/language_2/regress_23500_test.dart
diff --git a/tests/language_strong/regress_23537_test.dart b/tests/language_2/regress_23537_test.dart
similarity index 100%
rename from tests/language_strong/regress_23537_test.dart
rename to tests/language_2/regress_23537_test.dart
diff --git a/tests/language_strong/regress_23650_test.dart b/tests/language_2/regress_23650_test.dart
similarity index 100%
rename from tests/language_strong/regress_23650_test.dart
rename to tests/language_2/regress_23650_test.dart
diff --git a/tests/language_2/regress_23996_test.dart b/tests/language_2/regress_23996_test.dart
new file mode 100644
index 00000000000..4401a468d4e
--- /dev/null
+++ b/tests/language_2/regress_23996_test.dart
@@ -0,0 +1,77 @@
+// Copyright (c) 2016, 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.
+
+import "dart:async";
+import "package:async_helper/async_helper.dart";
+
+/// This test verifies that an await for loop sends the correct
+/// signals to the stream it iterates over:
+/// 1) A listen event.
+/// 2) A pause event when the loop body is awaiting something,
+///    and more elements arrive on the stream.  See issue
+///    https://github.com/dart-lang/sdk/issues/23996 .
+/// 3) A resume event, when the loop is again ready to iterate.
+main() {
+  Completer listenEventReceived = new Completer();
+  Completer pauseEventReceived = new Completer();
+  Completer resumeEventReceived = new Completer();
+  StreamController controller = new StreamController(
+      onListen: () => listenEventReceived.complete(),
+      onPause: () => pauseEventReceived.complete(),
+      onResume: () => resumeEventReceived.complete());
+
+  Completer forLoopEntered = new Completer();
+
+  /// The send function puts items on the stream. It waits for a
+  /// listener, puts "first" on the stream, waits for the for loop
+  /// to start (and eventually block), puts "second" on the stream
+  /// multiple times, letting the event loop run, until the for loop
+  /// pauses the stream because it it blocked.
+  /// The for loop unblocks after the pause message is received, and
+  /// reads the stream items, sending a stream resume message when it
+  /// is ready for more.
+  /// Then the send function puts a final "third" on the stream, and
+  /// closes the stream.
+  send() async {
+    await listenEventReceived.future;
+    controller.add('first');
+    await forLoopEntered.future;
+    var timer = new Timer.periodic(new Duration(milliseconds: 10), (timer) {
+      controller.add('second');
+    });
+    await pauseEventReceived.future;
+    // pauseEventReceived.future completes when controller.stream is
+    // paused by the await-for loop below. What's specified is that
+    // await-for must pause immediately on an "await", but instead
+    // the implementations agree on not pausing until receiving the
+    // next event. For this reason, [timer] will call its callback at
+    // least once before we cancel it again.
+    timer.cancel();
+    await resumeEventReceived.future;
+    controller.add('third');
+    controller.close();
+  }
+
+  receive() async {
+    bool thirdReceived = false;
+    await for (var entry in controller.stream) {
+      if (entry == 'first') {
+        forLoopEntered.complete();
+        await pauseEventReceived.future;
+      } else if (entry == 'third') {
+        thirdReceived = true;
+      }
+    }
+    if (!thirdReceived) {
+      throw "Error in await-for loop: 'third' not received";
+    }
+  }
+
+  asyncTest(() async {
+    // We need to start both functions in parallel, and wait on them both.
+    var f = send();
+    await receive();
+    await f;
+  });
+}
diff --git a/tests/language_2/regress_24283_test.dart b/tests/language_2/regress_24283_test.dart
new file mode 100644
index 00000000000..056bfd8a41d
--- /dev/null
+++ b/tests/language_2/regress_24283_test.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2015, 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.
+
+import "package:expect/expect.dart";
+
+main() {
+  // Smi
+  var i = 1 << 30;
+  var j = -i;
+  Expect.equals(0, i >> 37);
+  Expect.equals(-1, j >> 37);
+  // Mint
+  i = 1 << 50;
+  j = -i;
+  Expect.equals(0, i >> 67);
+  Expect.equals(-1, j >> 67);
+}
diff --git a/tests/language_2/regress_24567_test.dart b/tests/language_2/regress_24567_test.dart
new file mode 100644
index 00000000000..8010da7a9d1
--- /dev/null
+++ b/tests/language_2/regress_24567_test.dart
@@ -0,0 +1,17 @@
+// Copyright (c) 2016, 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.
+
+import "package:expect/expect.dart";
+import 'dart:math' as math;
+
+class Random {}
+
+typedef F(Random r);
+
+main() {
+  f(Random r) {}
+  g(math.Random r) {}
+  Expect.isTrue(f is F);
+  Expect.isFalse(g is F);
+}
diff --git a/tests/language_2/regress_24935_test.dart b/tests/language_2/regress_24935_test.dart
new file mode 100644
index 00000000000..430629f7434
--- /dev/null
+++ b/tests/language_2/regress_24935_test.dart
@@ -0,0 +1,23 @@
+// Copyright (c) 2016, 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.
+
+import 'dart:async';
+
+S() => new Stream.fromIterable([1]);
+
+Future main() async {
+  L:
+  for (var s = 0; s < 10; s++) {
+    await for (var s1 in S()) {
+      await for (var s2 in S()) {
+        continue L;
+      }
+    }
+  }
+  // Regression check: make sure throwing an exception
+  // after breaking out of the innermost loop does not
+  // crash the VM. In other words, the expected test
+  // outcome is an unhandled exception.
+  throw "ball"; //# 01: runtime error
+}
diff --git a/tests/language_2/regress_25122_test.dart b/tests/language_2/regress_25122_test.dart
new file mode 100644
index 00000000000..b7d4068feeb
--- /dev/null
+++ b/tests/language_2/regress_25122_test.dart
@@ -0,0 +1,10 @@
+// Copyright (c) 2015, 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.
+
+main() {}
+
+class AbstractListMember<E, M extends AbstractListMember<E, M>> {}
+
+class RepoListMember<M extends RepoListMember<M>>
+    extends AbstractListMember<String, M> {}
diff --git a/tests/language_2/regress_25246_1_test.dart b/tests/language_2/regress_25246_1_test.dart
new file mode 100644
index 00000000000..2df6b056235
--- /dev/null
+++ b/tests/language_2/regress_25246_1_test.dart
@@ -0,0 +1,11 @@
+// Copyright (c) 2015, 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.
+
+import 'regress_25246_2.dart';
+
+class ConcreteClass extends Object with MixIn {}
+
+void main() {
+  new ConcreteClass().test();
+}
diff --git a/tests/language_2/regress_25246_2.dart b/tests/language_2/regress_25246_2.dart
new file mode 100644
index 00000000000..736818c89cf
--- /dev/null
+++ b/tests/language_2/regress_25246_2.dart
@@ -0,0 +1,12 @@
+// Copyright (c) 2015, 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.
+
+import 'regress_25246_3.dart';
+
+class MixIn {
+  var test3 = new Test3(() {});
+  void test() {
+    test3.test();
+  }
+}
diff --git a/tests/language_2/regress_25246_3.dart b/tests/language_2/regress_25246_3.dart
new file mode 100644
index 00000000000..ce61a2eaca9
--- /dev/null
+++ b/tests/language_2/regress_25246_3.dart
@@ -0,0 +1,11 @@
+// Copyright (c) 2015, 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.
+
+class Test3 {
+  final fn;
+  Test3(this.fn);
+  void test() {
+    fn();
+  }
+}
diff --git a/tests/language_2/regress_25389_part.dart b/tests/language_2/regress_25389_part.dart
new file mode 100644
index 00000000000..254c87baca7
--- /dev/null
+++ b/tests/language_2/regress_25389_part.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2016, 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.
+
+part of regress_25389;
+
+abstract class ComponentState<S extends ComponentState<S>> {}
+
+abstract class AbstractListEditorState<D,
+    S extends AbstractListEditorState<D, S>> extends ComponentState<S> {}
+
+class IssueListEditorState
+    extends AbstractListEditorState<String, IssueListEditorState>
+    implements ComponentState<IssueListEditorState> {}
diff --git a/tests/language_2/regress_25389_test.dart b/tests/language_2/regress_25389_test.dart
new file mode 100644
index 00000000000..f15bb0c495d
--- /dev/null
+++ b/tests/language_2/regress_25389_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2016, 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.
+// VMOptions=--error-on-bad-type
+
+library regress_25389;
+
+part 'regress_25389_part.dart';
+
+main() {
+  new IssueListEditorState();
+}
+
+abstract class AbstractListEditor<D, S extends AbstractListEditorState<D, S>> {}
diff --git a/tests/language_2/regress_25550_test.dart b/tests/language_2/regress_25550_test.dart
new file mode 100644
index 00000000000..4a8a7c5954d
--- /dev/null
+++ b/tests/language_2/regress_25550_test.dart
@@ -0,0 +1,17 @@
+// Copyright (c) 2016, 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.
+
+typedef int Adder(int a, int b);
+
+class Mock {
+  noSuchMethod(i) => null;
+}
+
+class MockAdder extends Mock {
+  int call(int a, int b);
+}
+
+main() {
+  Adder adder = new MockAdder();
+}
diff --git a/tests/language_2/regress_25568_test.dart b/tests/language_2/regress_25568_test.dart
new file mode 100644
index 00000000000..14d498672ab
--- /dev/null
+++ b/tests/language_2/regress_25568_test.dart
@@ -0,0 +1,24 @@
+// Copyright (c) 2016, 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.
+
+main() {
+  var c1 = new BacklogListEditorState();
+  var c2 = new BacklogsState();
+}
+
+class BacklogListEditorState
+    extends AbstractListEditorState<BacklogsState, BacklogListEditorState> {}
+
+class BacklogsState extends MutableEntityState<BacklogsState> {}
+
+abstract class AbstractListEditorState<ES extends ComponentState<ES>,
+    S extends AbstractListEditorState<ES, S>> extends ComponentState<S> {}
+
+abstract class ComponentState<S extends ComponentState<S>> {}
+
+abstract class EntityState<ES extends EntityState<ES>>
+    extends ComponentState<ES> {}
+
+abstract class MutableEntityState<S extends MutableEntityState<S>>
+    extends EntityState<S> implements ComponentState<S> {}
diff --git a/tests/language_2/regress_25609_lib1.dart b/tests/language_2/regress_25609_lib1.dart
new file mode 100644
index 00000000000..2be30116189
--- /dev/null
+++ b/tests/language_2/regress_25609_lib1.dart
@@ -0,0 +1,9 @@
+// Copyright (c) 2016, 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.
+
+library regress_25609_lib1;
+
+import 'regress_25609_lib2.dart';
+
+typedef Bar Foo(int y);
diff --git a/tests/language_2/regress_25609_lib2.dart b/tests/language_2/regress_25609_lib2.dart
new file mode 100644
index 00000000000..d51c0614cb6
--- /dev/null
+++ b/tests/language_2/regress_25609_lib2.dart
@@ -0,0 +1,7 @@
+// Copyright (c) 2016, 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.
+
+library regress_25609_lib2;
+
+typedef void Bar(double x);
diff --git a/tests/language_2/regress_25609_test.dart b/tests/language_2/regress_25609_test.dart
new file mode 100644
index 00000000000..67b783c945c
--- /dev/null
+++ b/tests/language_2/regress_25609_test.dart
@@ -0,0 +1,13 @@
+// Copyright (c) 2016, 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.
+
+// VMOptions=--error-on-bad-type
+
+import 'regress_25609_lib1.dart';
+
+Foo baz() => null;
+
+main() {
+  baz();
+}
diff --git a/tests/language_2/regress_25620_test.dart b/tests/language_2/regress_25620_test.dart
new file mode 100644
index 00000000000..ed47189c1d5
--- /dev/null
+++ b/tests/language_2/regress_25620_test.dart
@@ -0,0 +1,8 @@
+// Copyright (c) 2016, 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.
+
+import "dart:async";
+
+typedef Future<T> SyncedExecutionFn<T>(Future<T> fn());
+main() {}
diff --git a/tests/language_2/regress_25935_test.dart b/tests/language_2/regress_25935_test.dart
new file mode 100644
index 00000000000..5b2e4e140bf
--- /dev/null
+++ b/tests/language_2/regress_25935_test.dart
@@ -0,0 +1,25 @@
+// Copyright (c) 2016, 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.
+
+main() {
+  AddIssueSourceMember2 m = new AddIssueSourceMember2();
+}
+
+abstract class RepoListEditorState2<M extends RepoListMember2<M>,
+        S extends RepoListEditorState2<M, S>>
+    extends AbstractListEditorState2<M, S> {}
+
+abstract class AbstractListEditorState2<
+    M extends AbstractListMember2<Object, M>,
+    S extends AbstractListEditorState2<M, S>> extends ComponentState2<S> {}
+
+class AddIssueSourceMember2 extends RepoListMember2<AddIssueSourceMember2> {}
+
+class RepoListMember2<M extends RepoListMember2<M>>
+    extends AbstractListMember2<Object, M> {}
+
+abstract class AbstractListMember2<E, M extends AbstractListMember2<E, M>>
+    extends ComponentState2<M> {}
+
+abstract class ComponentState2<S extends ComponentState2<S>> {}
diff --git a/tests/language_2/regress_26133_test.dart b/tests/language_2/regress_26133_test.dart
new file mode 100644
index 00000000000..7c657a1d573
--- /dev/null
+++ b/tests/language_2/regress_26133_test.dart
@@ -0,0 +1,15 @@
+// Copyright (c) 2016, 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.
+
+import 'dart:async';
+
+var x = 'a';
+
+Future<int> foo() async {
+  return x; /*@compile-error=unspecified*/
+}
+
+main() {
+  foo();
+}
diff --git a/tests/language_2/regress_26175_test.dart b/tests/language_2/regress_26175_test.dart
new file mode 100644
index 00000000000..dd7ac2a46f9
--- /dev/null
+++ b/tests/language_2/regress_26175_test.dart
@@ -0,0 +1,74 @@
+// Copyright (c) 2015, 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.
+
+import 'dart:async';
+
+import "package:expect/expect.dart";
+import "package:async_helper/async_helper.dart";
+
+// Test that local variable reads and writes are sequenced correctly with
+// respect to reads and writes in an awaited Future.  See issue 26175.
+
+// Reads are sequenced correctly with respect to writes in a Future.
+Future test1() async {
+  var x = 'a';
+  f() async => x = 'b';
+  Expect.equals('abb', '${x}${await f()}${x}');
+}
+
+// Writes are sequenced correctly with respect to writes in a Future.
+Future test2(ignore) async {
+  var x;
+  f() async => x = 'b';
+  Expect.equals('abb', '${x = 'a'}${await f()}${x}');
+}
+
+// Writes are sequenced correctly with respect to reads in a Future.
+Future test3(ignore) async {
+  var x = 'a';
+  f() async => x;
+  Expect.equals('bbb', '${x = 'b'}${await f()}${x}');
+}
+
+// Repeat the same tests for static variables.
+var cell = 'a';
+
+asyncReadCell() async => cell;
+asyncWriteCell(value) async => cell = value;
+
+Future test4(ignore) async {
+  // This test assumes that it can read the initial value of cell.
+  Expect.equals('abb', '${cell}${await asyncWriteCell('b')}${cell}');
+}
+
+Future test5(ignore) async {
+  Expect.equals('abb', '${cell = 'a'}${await asyncWriteCell('b')}${cell}');
+}
+
+Future test6(ignore) async {
+  Expect.equals('bbb', '${cell = 'b'}${await asyncReadCell()}${cell}');
+}
+
+// Test that throwing is sequenced correctly with respect to other effects.
+Future test7(ignore) async {
+  cell = 'a';
+  try {
+    Expect.equals(
+        'unreachable', '${throw 0}${await asyncWriteCell('b')}${cell}');
+  } catch (_) {
+    Expect.equals('a', cell);
+  }
+}
+
+main() {
+  asyncStart();
+  test1()
+      .then(test2)
+      .then(test3)
+      .then(test4)
+      .then(test5)
+      .then(test6)
+      .then(test7)
+      .then((_) => asyncEnd());
+}
diff --git a/tests/language_2/regress_26230_test.dart b/tests/language_2/regress_26230_test.dart
new file mode 100644
index 00000000000..77792bc4eb5
--- /dev/null
+++ b/tests/language_2/regress_26230_test.dart
@@ -0,0 +1,48 @@
+// Copyright (c) 2016, 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.
+
+class _RenderTabBar extends RenderBox
+    with
+        ContainerRenderObjectMixin<RenderBox, _TabBarParentData>,
+        RenderBoxContainerDefaultsMixin<RenderBox, _TabBarParentData> {}
+
+class RenderObject {}
+
+class RenderSector extends RenderObject {}
+
+class RenderBox extends RenderObject {}
+
+class ParentData {}
+
+class BoxParentData extends ParentData {}
+
+class SectorParentData extends ParentData {}
+
+class ContainerParentDataMixin<ChildType extends RenderObject> {}
+
+class ContainerRenderObjectMixin<ChildType extends RenderObject,
+    ParentDataType extends ContainerParentDataMixin<ChildType>> {}
+
+class SectorChildListParentData extends SectorParentData
+    with ContainerParentDataMixin<RenderSector> {}
+
+class RenderDecoratedSector extends RenderSector {}
+
+class RenderSectorWithChildren extends RenderDecoratedSector
+    with ContainerRenderObjectMixin<RenderSector, SectorChildListParentData> {}
+
+class ContainerBoxParentDataMixin<ChildType extends RenderObject>
+    extends BoxParentData with ContainerParentDataMixin<ChildType> {}
+
+class RenderBoxContainerDefaultsMixin<ChildType extends RenderBox,
+        ParentDataType extends ContainerBoxParentDataMixin<ChildType>>
+    implements ContainerRenderObjectMixin<ChildType, ParentDataType> {}
+
+class FlexParentData extends ContainerBoxParentDataMixin<RenderBox> {}
+
+class _TabBarParentData extends ContainerBoxParentDataMixin<RenderBox> {}
+
+main() {
+  new _RenderTabBar();
+}
diff --git a/tests/language_2/regress_26453_test.dart b/tests/language_2/regress_26453_test.dart
new file mode 100644
index 00000000000..32d6f599234
--- /dev/null
+++ b/tests/language_2/regress_26453_test.dart
@@ -0,0 +1,33 @@
+// Copyright (c) 2016, 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.
+
+// The program crashed with segfault because we when we first compile foo
+// and bar we allocate all four variables (a, b, c and d) to the context.
+// When we compile foo the second time (with optimizations) we allocate
+// only c and d to the context. This happened because parser folds away
+// "${a}" and "${b}" as constant expressions when parsing bar on its own,
+// i.e. the expressions were not parsed again and thus a and b were not
+// marked as captured.
+// This caused a mismatch between a context that bar expects and that
+// the optimized version of foo produces.
+
+foo() {
+  const a = 1;
+  const b = 2;
+  var c = 3;
+  var d = 4;
+
+  bar() {
+    if ("${a}" != "1") throw "failed";
+    if ("${b}" != "2") throw "failed";
+    if ("${c}" != "3") throw "failed";
+    if ("${d}" != "4") throw "failed";
+  }
+
+  bar();
+}
+
+main() {
+  for (var i = 0; i < 50000; i++) foo();
+}
diff --git a/tests/language_2/regress_26530_test.dart b/tests/language_2/regress_26530_test.dart
new file mode 100644
index 00000000000..ab22638fb97
--- /dev/null
+++ b/tests/language_2/regress_26530_test.dart
@@ -0,0 +1,32 @@
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import "package:expect/expect.dart";
+
+var trace = "";
+
+main() {
+  var x = 0;
+  try {
+    try {
+      throw x++; // 1
+    } on int catch (e) {
+      trace += "$e";
+      trace += "-$x";
+      x++; // 2
+      try {
+        x++; // 3
+        rethrow;
+      } finally {
+        trace += "-f";
+        x++; // 4
+      }
+    }
+  } catch (e) {
+    trace += "-c";
+    trace += "-$e";
+    trace += "-$x";
+  }
+  Expect.equals("0-1-f-c-0-4", trace);
+}
diff --git a/tests/language_2/regress_26543_1_test.dart b/tests/language_2/regress_26543_1_test.dart
new file mode 100644
index 00000000000..39305f67cdb
--- /dev/null
+++ b/tests/language_2/regress_26543_1_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2016, 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.
+
+// Regression test for issue 26543
+
+class C {
+  var x;
+  C() : x = null ?? <int, int>{} {}
+}
+
+main() {
+  print(new C());
+}
diff --git a/tests/language_2/regress_26543_2_test.dart b/tests/language_2/regress_26543_2_test.dart
new file mode 100644
index 00000000000..ac7b5f5cc3a
--- /dev/null
+++ b/tests/language_2/regress_26543_2_test.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2016, 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.
+
+// Regression test for issue 26543
+
+class C {
+  var x, y;
+  C()
+      : x = null ?? <int, int>{},
+        y = 0 {}
+}
+
+main() {
+  print(new C());
+}
diff --git a/tests/language_2/regress_26543_3_test.dart b/tests/language_2/regress_26543_3_test.dart
new file mode 100644
index 00000000000..91bbfa4dcfb
--- /dev/null
+++ b/tests/language_2/regress_26543_3_test.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2016, 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.
+
+// Regression test for issue 26543
+
+class C {
+  var x, y;
+  C()
+      : x = 0,
+        y = null ?? <int, int>{} {}
+}
+
+main() {
+  print(new C());
+}
diff --git a/tests/language_2/regress_26668_test.dart b/tests/language_2/regress_26668_test.dart
new file mode 100644
index 00000000000..4a2945873bd
--- /dev/null
+++ b/tests/language_2/regress_26668_test.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2016, 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.
+
+import 'dart:async';
+
+main() async {
+  var myClass = new CustomClass<int>();
+  await myClass.processData();
+}
+
+class CustomClass<T> {
+  Future<T> processData() async {
+    return null;
+  }
+}
diff --git a/tests/language_2/regress_26855_test.dart b/tests/language_2/regress_26855_test.dart
new file mode 100644
index 00000000000..0377fa322d5
--- /dev/null
+++ b/tests/language_2/regress_26855_test.dart
@@ -0,0 +1,25 @@
+// Copyright (c) 2016, 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.
+
+void f0(this.x) {} // //# 0: compile-time error
+
+void f1(int g(this.x)) {} // //# 1: compile-time error
+
+void f2(int g(int this.x)) {} // //# 2: compile-time error
+
+class C {
+  C();
+  var x;
+  void f3(int g(this.x)) {} // //# 3: compile-time error
+  C.f4(int g(this.x)); // //# 4: compile-time error
+}
+
+main() {
+  f0(null); // //# 0: continued
+  f1(null); // //# 1: continued
+  f2(null); // //# 2: continued
+  C c = new C();
+  c.f3(null); // //# 3: continued
+  new C.f4(null); // //# 4: continued
+}
diff --git a/tests/language_2/regress_26948_test.dart b/tests/language_2/regress_26948_test.dart
new file mode 100644
index 00000000000..c37d3f74b22
--- /dev/null
+++ b/tests/language_2/regress_26948_test.dart
@@ -0,0 +1,26 @@
+// Copyright (c) 2016, 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.
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
+
+import 'dart:async';
+import "package:expect/expect.dart";
+
+void check(Function f) {
+  Expect.isTrue(f());
+}
+
+Future doSync() async {
+  try {
+    await 123;
+  } finally {
+    var next = 5.0;
+    check(() => next == 5.0);
+  }
+}
+
+main() async {
+  for (int i = 0; i < 20; i++) {
+    await doSync();
+  }
+}
diff --git a/tests/language_2/regress_27164_test.dart b/tests/language_2/regress_27164_test.dart
new file mode 100644
index 00000000000..a71873cc987
--- /dev/null
+++ b/tests/language_2/regress_27164_test.dart
@@ -0,0 +1,19 @@
+// Copyright (c) 2016, 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.
+
+// Regression test for issue 27164.
+
+import 'package:expect/expect.dart';
+
+String simpleEcho(String arg) => arg;
+
+class Echo {
+  final echo;
+  // Check that the expression simpleEcho is a compile-time constant.
+  const Echo() : echo = simpleEcho;
+}
+
+void main() {
+  Expect.equals("hello", const Echo().echo("hello"));
+}
diff --git a/tests/language_2/regress_27572_test.dart b/tests/language_2/regress_27572_test.dart
new file mode 100644
index 00000000000..398fdb9af59
--- /dev/null
+++ b/tests/language_2/regress_27572_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2016, 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.
+
+// Test has been modified and doesn't test http://dartbug.com/275272 anymore.
+// Static unresolved calls are not allowed anymore.
+
+import "package:expect/expect.dart";
+
+import 'dart:collection' as col;
+
+main() {
+  col.foobar(1234567); /*@compile-error=unspecified*/
+}
diff --git a/tests/language_2/regress_27617_test.dart b/tests/language_2/regress_27617_test.dart
new file mode 100644
index 00000000000..960d987b73c
--- /dev/null
+++ b/tests/language_2/regress_27617_test.dart
@@ -0,0 +1,15 @@
+// Copyright (c) 2016, 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.
+
+class Foo {
+  final String greeting;
+  Foo._(this.greeting) {}
+
+  // Const constructor must not redirect to non-const constructor.
+  const Foo.hi() : this._('hi'); // //# 1: compile-time error
+}
+
+main() {
+  const h = const Foo.hi(); // //# 1: continued
+}
diff --git a/tests/language_2/regress_27659_test.dart b/tests/language_2/regress_27659_test.dart
new file mode 100644
index 00000000000..e40a8866991
--- /dev/null
+++ b/tests/language_2/regress_27659_test.dart
@@ -0,0 +1,28 @@
+// Copyright (c) 2016, 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.
+
+const String lineLength = '120';
+
+foo({lineLength: lineLength}) {
+  print(lineLength);
+}
+
+bar({lineLength: lineLength}) async {
+  print(lineLength);
+}
+
+baz([lineLength = lineLength]) {
+  print(lineLength);
+}
+
+qux([lineLength = lineLength]) async {
+  print(lineLength);
+}
+
+main() {
+  foo();
+  bar();
+  baz();
+  qux();
+}
diff --git a/tests/language_2/regress_27700_test.dart b/tests/language_2/regress_27700_test.dart
new file mode 100644
index 00000000000..c5bacecdfc0
--- /dev/null
+++ b/tests/language_2/regress_27700_test.dart
@@ -0,0 +1,10 @@
+// Copyright (c) 2017, 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.
+
+// Regression test for issue 27700.
+
+main() {
+  var x = new List(0);
+  var z = "$x";
+}
diff --git a/tests/language_2/regress_27957_lib1.dart b/tests/language_2/regress_27957_lib1.dart
new file mode 100644
index 00000000000..7a06ff38f06
--- /dev/null
+++ b/tests/language_2/regress_27957_lib1.dart
@@ -0,0 +1,9 @@
+// Copyright (c) 2016, 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.
+
+library regress_27957_lib1;
+
+class Superclass {
+  int m() => 1;
+}
diff --git a/tests/language_2/regress_27957_lib2.dart b/tests/language_2/regress_27957_lib2.dart
new file mode 100644
index 00000000000..24097d09f8a
--- /dev/null
+++ b/tests/language_2/regress_27957_lib2.dart
@@ -0,0 +1,9 @@
+// Copyright (c) 2016, 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.
+
+library regress_27957_lib2;
+
+class Superclass {
+  int m() => 2;
+}
diff --git a/tests/language_2/regress_27957_test.dart b/tests/language_2/regress_27957_test.dart
new file mode 100644
index 00000000000..3efa497e2ac
--- /dev/null
+++ b/tests/language_2/regress_27957_test.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2016, 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.
+
+import "package:expect/expect.dart";
+import 'regress_27957_lib1.dart' as s1;
+import 'regress_27957_lib2.dart' as s2;
+
+class Mixin {}
+
+class C1 = s1.Superclass with Mixin;
+class C2 = s2.Superclass with Mixin;
+
+main() {
+  var c1 = new C1(), c2 = new C2();
+  Expect.equals(1, c1.m());
+  Expect.equals(2, c2.m());
+}
diff --git a/tests/language_2/regress_28217_test.dart b/tests/language_2/regress_28217_test.dart
new file mode 100644
index 00000000000..a49876fad33
--- /dev/null
+++ b/tests/language_2/regress_28217_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2017, 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.
+
+// Test non-existing redirecting constructor and
+// redirecting to a factory constructor.
+
+class B {
+  B() : this.a(); //   //# none: compile-time error
+  factory B.a() {} //  //# 01: compile-time error
+  B.a(); //            //# 02: ok
+}
+
+main() => new B();
diff --git a/tests/language_2/regress_28255_test.dart b/tests/language_2/regress_28255_test.dart
new file mode 100644
index 00000000000..0441e8be320
--- /dev/null
+++ b/tests/language_2/regress_28255_test.dart
@@ -0,0 +1,23 @@
+// Copyright (c) 2017, 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.
+
+// Regression test for issue 28255
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+class Class {
+  noSuchMethod(i) => true;
+
+  foo() {
+    dynamic o = this;
+    Expect.isFalse(o.bar is Null);
+    Expect.isTrue(o.bar != null);
+    Expect.equals(true.runtimeType, o.bar.runtimeType);
+  }
+}
+
+main() {
+  reflectClass(Class).newInstance(const Symbol(''), []).reflectee.foo();
+}
diff --git a/tests/language_2/regress_28278_lib.dart b/tests/language_2/regress_28278_lib.dart
new file mode 100644
index 00000000000..0bc67f1e3b3
--- /dev/null
+++ b/tests/language_2/regress_28278_lib.dart
@@ -0,0 +1,5 @@
+// Copyright (c) 2017, 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.
+
+foo(x) => x + "Hello";
diff --git a/tests/language_strong/language_strong.status b/tests/language_strong/language_strong.status
index b9888ce11cb..da028fc3a23 100644
--- a/tests/language_strong/language_strong.status
+++ b/tests/language_strong/language_strong.status
@@ -184,10 +184,6 @@ regress_20394_test: Skip
 regress_21793_test: Skip
 regress_21912_test: Skip
 regress_22438_test: Skip
-regress_22936_test: Skip
-regress_23038_test: Skip
-regress_23051_test: Skip
-regress_23408_test: Skip
 return_type_test: Skip
 rewrite_implicit_this_test: Skip
 setter4_test: Skip
@@ -263,14 +259,12 @@ internal_library_test/02: MissingStaticWarning # Issue 28823
 main_not_a_function_test/01: MissingStaticWarning # Issue 28823
 main_test/03: MissingStaticWarning # Issue 28823
 no_main_test/01: MissingStaticWarning # Issue 28823
-regress_23089_test: CompileTimeError # Issue 28823
 reify_typevar_static_test/00: MissingCompileTimeError # Issue 28823
 super_setter_test: StaticWarning # Issue 28823
 try_catch4_test: StaticWarning # Issue 28823
 try_catch5_test: StaticWarning # Issue 28823
 
 [ $compiler == dartdevc ]
-regress_23089_test: CompileTimeError # Issue 29920
 reify_typevar_static_test/00: MissingCompileTimeError # Issue 29920
 
 [ $compiler == dartdevc && $runtime != none ]
@@ -300,7 +294,6 @@ mint_arithmetic_test: RuntimeError # Issue 29920
 nan_identical_test: RuntimeError # Issue 29920
 nested_switch_label_test: RuntimeError # Issue 29920
 regress_16640_test: RuntimeError # Issue 29920
-regress_22443_test: RuntimeError # Issue 29920
 stack_overflow_stacktrace_test: RuntimeError # Issue 29920
 stack_overflow_test: RuntimeError # Issue 29920
 stacktrace_test: RuntimeError # Issue 29920
diff --git a/tests/language_strong/language_strong_kernel.status b/tests/language_strong/language_strong_kernel.status
index a86278aa7ab..ec60ecfcb00 100644
--- a/tests/language_strong/language_strong_kernel.status
+++ b/tests/language_strong/language_strong_kernel.status
@@ -28,8 +28,6 @@ main_not_a_function_test/01: DartkCrash
 mixin_generic_test: RuntimeError
 recursive_generic_test: RuntimeError
 redirecting_factory_reflection_test: RuntimeError
-regress_22443_test: RuntimeError
-regress_22700_test: RuntimeError
 regress_r24720_test: RuntimeError
 reify_typevar_static_test/00: MissingCompileTimeError
 reify_typevar_test: RuntimeError