library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/issue41156.dart:39:29: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   String Function(int) x2 = (int v) /* error */ {
//                             ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:44:29: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
//   String Function(int) x3 = (int v) /* error */ {
//                             ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:49:29: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   String Function(int) x5 = (int v) /* error */ {
//                             ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:54:29: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
//   String Function(int) x6 = (int v) /* error */ {
//                             ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:59:37: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   Future<String> Function(int) y2 = (int v) async /* error */ {
//                                     ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:64:37: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
//   Future<String> Function(int) y3 = (int v) async /* error */ {
//                                     ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:69:37: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   Future<String> Function(int) y5 = (int v) async /* error */ {
//                                     ^
//
// pkg/front_end/testcases/nnbd/issue41156.dart:74:37: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
//   Future<String> Function(int) y6 = (int v) async /* error */ {
//                                     ^
//
import self as self;
import "dart:core" as core;
import "dart:async" as asy;

static method throwing() → Never
  return throw "";
static method main() → void {
  (core::int) → core::String x1 = (core::int v) → Never => throw v;
  (core::int) → core::String x2 = (core::int v) → Never {
    throw v;
  };
  (core::int) → core::String x3 = (core::int v) → Never {
    return throw v;
  };
  (core::int) → core::String x4 = (core::int v) → Never => self::throwing();
  (core::int) → core::String x5 = (core::int v) → Never {
    self::throwing();
  };
  (core::int) → core::String x6 = (core::int v) → Never {
    return self::throwing();
  };
  (core::int) → asy::Future<core::String> y1 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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 {
        #L1:
        {
          :return_value = throw v;
          break #L1;
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
  (core::int) → asy::Future<core::String> y2 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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 {
        #L2:
        {
          throw v;
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
  (core::int) → asy::Future<core::String> y3 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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 {
        #L3:
        {
          :return_value = throw v;
          break #L3;
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
  (core::int) → asy::Future<core::String> y4 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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 {
        #L4:
        {
          :return_value = self::throwing();
          break #L4;
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
  (core::int) → asy::Future<core::String> y5 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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 {
        #L5:
        {
          self::throwing();
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
  (core::int) → asy::Future<core::String> y6 = (core::int v) → asy::Future<Never> /* originally async */ {
    final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
    asy::FutureOr<Never>? :return_value;
    dynamic :async_stack_trace;
    (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:
        {
          :return_value = self::throwing();
          break #L6;
        }
        asy::_completeOnAsyncReturn(:async_completer, :return_value);
        return;
      }
      on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
        :async_completer.{asy::Completer::completeError}(exception, stack_trace);
      }
    :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
    :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
    :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
    :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
    return :async_completer.{asy::Completer::future};
  };
}
static method errors() → void /* originally async */ {
  final asy::_AsyncAwaitCompleter<dynamic> :async_completer = new asy::_AsyncAwaitCompleter::•<dynamic>();
  asy::FutureOr<dynamic>? :return_value;
  dynamic :async_stack_trace;
  (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 {
      #L7:
      {
        (core::int) → core::String x2 = (core::int v) → core::String {
          try {
            throw v;
          }
          on core::Object catch(final core::Object _) {
          }
          return let final<BottomType> #t1 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:39:29: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  String Function(int) x2 = (int v) /* error */ {
                            ^" in null;
        };
        (core::int) → core::String x3 = (core::int v) → Never {
          try {
            return throw v;
          }
          on core::Object catch(final core::Object _) {
          }
          return let final<BottomType> #t2 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:44:29: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
  String Function(int) x3 = (int v) /* error */ {
                            ^" in null;
        };
        (core::int) → core::String x5 = (core::int v) → core::String {
          try {
            self::throwing();
          }
          on core::Object catch(final core::Object _) {
          }
          return let final<BottomType> #t3 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:49:29: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  String Function(int) x5 = (int v) /* error */ {
                            ^" in null;
        };
        (core::int) → core::String x6 = (core::int v) → Never {
          try {
            return self::throwing();
          }
          on core::Object catch(final core::Object _) {
          }
          return let final<BottomType> #t4 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:54:29: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
  String Function(int) x6 = (int v) /* error */ {
                            ^" in null;
        };
        (core::int) → asy::Future<core::String> y2 = (core::int v) → asy::Future<core::String> /* originally async */ {
          final asy::_AsyncAwaitCompleter<core::String> :async_completer = new asy::_AsyncAwaitCompleter::•<core::String>();
          asy::FutureOr<core::String>? :return_value;
          dynamic :async_stack_trace;
          (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 {
              #L8:
              {
                try {
                  throw v;
                }
                on core::Object catch(final core::Object _) {
                }
                :return_value = let final<BottomType> #t5 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:59:37: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  Future<String> Function(int) y2 = (int v) async /* error */ {
                                    ^" in null;
                break #L8;
              }
              asy::_completeOnAsyncReturn(:async_completer, :return_value);
              return;
            }
            on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
              :async_completer.{asy::Completer::completeError}(exception, stack_trace);
            }
          :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
          return :async_completer.{asy::Completer::future};
        };
        (core::int) → asy::Future<core::String> y3 = (core::int v) → asy::Future<Never> /* originally async */ {
          final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
          asy::FutureOr<Never>? :return_value;
          dynamic :async_stack_trace;
          (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 {
              #L9:
              {
                try {
                  :return_value = throw v;
                  break #L9;
                }
                on core::Object catch(final core::Object _) {
                }
                :return_value = let final<BottomType> #t6 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:64:37: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
  Future<String> Function(int) y3 = (int v) async /* error */ {
                                    ^" in null;
                break #L9;
              }
              asy::_completeOnAsyncReturn(:async_completer, :return_value);
              return;
            }
            on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
              :async_completer.{asy::Completer::completeError}(exception, stack_trace);
            }
          :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
          return :async_completer.{asy::Completer::future};
        };
        (core::int) → asy::Future<core::String> y5 = (core::int v) → asy::Future<core::String> /* originally async */ {
          final asy::_AsyncAwaitCompleter<core::String> :async_completer = new asy::_AsyncAwaitCompleter::•<core::String>();
          asy::FutureOr<core::String>? :return_value;
          dynamic :async_stack_trace;
          (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 {
              #L10:
              {
                try {
                  self::throwing();
                }
                on core::Object catch(final core::Object _) {
                }
                :return_value = let final<BottomType> #t7 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:69:37: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  Future<String> Function(int) y5 = (int v) async /* error */ {
                                    ^" in null;
                break #L10;
              }
              asy::_completeOnAsyncReturn(:async_completer, :return_value);
              return;
            }
            on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
              :async_completer.{asy::Completer::completeError}(exception, stack_trace);
            }
          :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
          return :async_completer.{asy::Completer::future};
        };
        (core::int) → asy::Future<core::String> y6 = (core::int v) → asy::Future<Never> /* originally async */ {
          final asy::_AsyncAwaitCompleter<Never> :async_completer = new asy::_AsyncAwaitCompleter::•<Never>();
          asy::FutureOr<Never>? :return_value;
          dynamic :async_stack_trace;
          (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 {
              #L11:
              {
                try {
                  :return_value = self::throwing();
                  break #L11;
                }
                on core::Object catch(final core::Object _) {
                }
                :return_value = let final<BottomType> #t8 = invalid-expression "pkg/front_end/testcases/nnbd/issue41156.dart:74:37: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
  Future<String> Function(int) y6 = (int v) async /* error */ {
                                    ^" in null;
                break #L11;
              }
              asy::_completeOnAsyncReturn(:async_completer, :return_value);
              return;
            }
            on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
              :async_completer.{asy::Completer::completeError}(exception, stack_trace);
            }
          :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
          :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
          :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
          :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
          return :async_completer.{asy::Completer::future};
        };
      }
      asy::_completeOnAsyncReturn(:async_completer, :return_value);
      return;
    }
    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
      :async_completer.{asy::Completer::completeError}(exception, stack_trace);
    }
  :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :async_completer.{asy::_AsyncAwaitCompleter::start}(:async_op);
  return :async_completer.{asy::Completer::future};
}