library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:21:10: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//   yield* getStreamNull(); // error
//          ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:24:25: Error: A value of type 'Stream<dynamic>' can't be returned from a function with return type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
// Stream<bool> test5() => getStreamNull(); // error
//                         ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:38:12: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//     yield* getStreamNull(); // error
//            ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:41:27: Error: A value of type 'Stream<dynamic>' can't be returned from a function with return type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//   Stream<bool> test5() => getStreamNull(); // error
//                           ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:49:5: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//   })(); // error
//     ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:54:5: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//   })(); // error
//     ^
//
// pkg/front_end/testcases/nnbd/issue41437c.dart:55:46: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
//  - 'Stream' is from 'dart:async'.
//   Stream<bool> var5 = (() => getStreamNull())(); // error
//                                              ^
//
import self as self;
import "dart:async" as asy;
import "dart:core" as core;

static method getNull() → dynamic
  return null;
static method getStreamNull() → asy::Stream<dynamic> /* originally async* */ {
  asy::_AsyncStarStreamController<dynamic>? :controller;
  dynamic :controller_stream;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  dynamic :saved_try_context_var1;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try
      try {
        #L1:
        {
          if(:controller.{asy::_AsyncStarStreamController::add}(null){(dynamic) → core::bool})
            return null;
          else
            [yield] null;
        }
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
      }
    finally {
      :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :controller = new asy::_AsyncStarStreamController::•<dynamic>(:async_op);
  :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<dynamic>};
  return :controller_stream;
}
static method getStreamBool() → asy::Stream<core::bool> /* originally async* */ {
  asy::_AsyncStarStreamController<core::bool>? :controller;
  dynamic :controller_stream;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  dynamic :saved_try_context_var1;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try
      try {
        #L2:
        {
          if(:controller.{asy::_AsyncStarStreamController::add}(true){(core::bool) → core::bool})
            return null;
          else
            [yield] null;
        }
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
      }
    finally {
      :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
  :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
  return :controller_stream;
}
static method test1() → asy::Stream<core::bool> /* originally async* */ {
  asy::_AsyncStarStreamController<core::bool>? :controller;
  dynamic :controller_stream;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  dynamic :saved_try_context_var1;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try
      try {
        #L3:
        {
          if(:controller.{asy::_AsyncStarStreamController::add}(self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool){(core::bool) → core::bool})
            return null;
          else
            [yield] null;
        }
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
      }
    finally {
      :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
  :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
  return :controller_stream;
}
static method test2() → asy::Stream<core::bool>
  return self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} asy::Stream<core::bool>;
static method test3() → core::bool
  return self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool;
static method test4() → asy::Stream<core::bool> /* originally async* */ {
  asy::_AsyncStarStreamController<core::bool>? :controller;
  dynamic :controller_stream;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  dynamic :saved_try_context_var1;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try
      try {
        #L4:
        {
          if(:controller.{asy::_AsyncStarStreamController::addStream}(invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:21:10: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
  yield* getStreamNull(); // error
         ^" in self::getStreamNull() as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>){(asy::Stream<core::bool>) → core::bool})
            return null;
          else
            [yield] null;
        }
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
      }
    finally {
      :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
  :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
  return :controller_stream;
}
static method test5() → asy::Stream<core::bool>
  return invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:24:25: Error: A value of type 'Stream<dynamic>' can't be returned from a function with return type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
Stream<bool> test5() => getStreamNull(); // error
                        ^" in self::getStreamNull() as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>;
static method test6() → asy::Stream<core::bool>
  return self::getStreamBool();
static method test7() → asy::Stream<core::bool> /* originally async* */ {
  asy::_AsyncStarStreamController<core::bool>? :controller;
  dynamic :controller_stream;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  dynamic :saved_try_context_var1;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try
      try {
        #L5:
        {
          if(:controller.{asy::_AsyncStarStreamController::addStream}(self::getStreamBool()){(asy::Stream<core::bool>) → core::bool})
            return null;
          else
            [yield] null;
        }
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
      }
    finally {
      :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
  :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
  return :controller_stream;
}
static method test() → dynamic /* originally async */ {
  final asy::_Future<dynamic> :async_future = new asy::_Future::•<dynamic>();
  core::bool* :is_sync = false;
  FutureOr<dynamic>? :return_value;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try {
      #L6:
      {
        function test1() → asy::Stream<core::bool> /* originally async* */ {
          asy::_AsyncStarStreamController<core::bool>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L7:
                {
                  if(:controller.{asy::_AsyncStarStreamController::add}(self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool){(core::bool) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
          return :controller_stream;
        }
        function test2() → asy::Stream<core::bool>
          return self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} asy::Stream<core::bool>;
        function test3() → core::bool
          return self::getNull() as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool;
        function test4() → asy::Stream<core::bool> /* originally async* */ {
          asy::_AsyncStarStreamController<core::bool>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L8:
                {
                  if(:controller.{asy::_AsyncStarStreamController::addStream}(invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:38:12: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
    yield* getStreamNull(); // error
           ^" in self::getStreamNull() as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>){(asy::Stream<core::bool>) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
          return :controller_stream;
        }
        function test5() → asy::Stream<core::bool>
          return invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:41:27: Error: A value of type 'Stream<dynamic>' can't be returned from a function with return type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
  Stream<bool> test5() => getStreamNull(); // error
                          ^" in self::getStreamNull() as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>;
        function test6() → asy::Stream<core::bool>
          return self::getStreamBool();
        function test7() → asy::Stream<core::bool> /* originally async* */ {
          asy::_AsyncStarStreamController<core::bool>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L9:
                {
                  if(:controller.{asy::_AsyncStarStreamController::addStream}(self::getStreamBool()){(asy::Stream<core::bool>) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
          return :controller_stream;
        }
        asy::Stream<core::bool> var1 = invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:49:5: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
  })(); // error
    ^" in (() → asy::Stream<dynamic> /* originally async* */ {
          asy::_AsyncStarStreamController<dynamic>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L10:
                {
                  if(:controller.{asy::_AsyncStarStreamController::add}(self::getNull()){(dynamic) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<dynamic>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<dynamic>};
          return :controller_stream;
        })(){() → asy::Stream<dynamic>} as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>;
        asy::Stream<core::bool> var2 = (() → dynamic => self::getNull())(){() → dynamic} as{TypeError,ForDynamic,ForNonNullableByDefault} asy::Stream<core::bool>;
        core::bool var3 = (() → dynamic => self::getNull())(){() → dynamic} as{TypeError,ForDynamic,ForNonNullableByDefault} core::bool;
        asy::Stream<core::bool> var4 = invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:54:5: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
  })(); // error
    ^" in (() → asy::Stream<dynamic> /* originally async* */ {
          asy::_AsyncStarStreamController<dynamic>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L11:
                {
                  if(:controller.{asy::_AsyncStarStreamController::addStream}(self::getStreamNull()){(asy::Stream<dynamic>) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<dynamic>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<dynamic>};
          return :controller_stream;
        })(){() → asy::Stream<dynamic>} as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>;
        asy::Stream<core::bool> var5 = invalid-expression "pkg/front_end/testcases/nnbd/issue41437c.dart:55:46: Error: A value of type 'Stream<dynamic>' can't be assigned to a variable of type 'Stream<bool>'.
 - 'Stream' is from 'dart:async'.
  Stream<bool> var5 = (() => getStreamNull())(); // error
                                             ^" in (() → asy::Stream<dynamic> => self::getStreamNull())(){() → asy::Stream<dynamic>} as{TypeError,ForNonNullableByDefault} asy::Stream<core::bool>;
        asy::Stream<core::bool> var6 = (() → asy::Stream<core::bool> => self::getStreamBool())(){() → asy::Stream<core::bool>};
        asy::Stream<core::bool> var7 = (() → asy::Stream<core::bool> /* originally async* */ {
          asy::_AsyncStarStreamController<core::bool>? :controller;
          dynamic :controller_stream;
          (dynamic) → dynamic :async_op_then;
          (core::Object, core::StackTrace) → dynamic :async_op_error;
          core::int :await_jump_var = 0;
          dynamic :await_ctx_var;
          dynamic :saved_try_context_var0;
          dynamic :saved_try_context_var1;
          function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
            try
              try {
                #L12:
                {
                  if(:controller.{asy::_AsyncStarStreamController::addStream}(self::getStreamBool()){(asy::Stream<core::bool>) → core::bool})
                    return null;
                  else
                    [yield] null;
                }
                return;
              }
              on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
                :controller.{asy::_AsyncStarStreamController::addError}(exception, stack_trace){(core::Object, core::StackTrace) → void};
              }
            finally {
              :controller.{asy::_AsyncStarStreamController::close}(){() → dynamic};
            }
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :controller = new asy::_AsyncStarStreamController::•<core::bool>(:async_op);
          :controller_stream = :controller.{asy::_AsyncStarStreamController::stream}{asy::Stream<core::bool>};
          return :controller_stream;
        })(){() → asy::Stream<core::bool>};
      }
      asy::_completeOnAsyncReturn(:async_future, :return_value, :is_sync);
      return;
    }
    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
      asy::_completeOnAsyncError(:async_future, exception, stack_trace, :is_sync);
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :async_op(){() → dynamic};
  :is_sync = true;
  return :async_future;
}
static method main() → dynamic {}