library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/forin.dart:9:17: Error: The type 'Iterable<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'Iterable<int>?' is nullable and 'Iterable<dynamic>' isn't.
//  - 'Iterable' is from 'dart:core'.
//   for (int x in i2) x;
//                 ^
//
// pkg/front_end/testcases/nnbd/forin.dart:10:18: Error: The type 'Iterable<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'Iterable<int>?' is nullable and 'Iterable<dynamic>' isn't.
//  - 'Iterable' is from 'dart:core'.
//   [for (int x in i2) x];
//                  ^
//
// pkg/front_end/testcases/nnbd/forin.dart:12:17: Error: The type 'List<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'List<int>?' is nullable and 'Iterable<dynamic>' isn't.
//  - 'List' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   for (int x in l2) x;
//                 ^
//
// pkg/front_end/testcases/nnbd/forin.dart:13:18: Error: The type 'List<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'List<int>?' is nullable and 'Iterable<dynamic>' isn't.
//  - 'List' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   [for (int x in l2) x];
//                  ^
//
// pkg/front_end/testcases/nnbd/forin.dart:15:17: Error: The type 'Object' used in the 'for' loop must implement 'Iterable<dynamic>'.
//  - 'Object' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   for (int x in o1) x;
//                 ^
//
// pkg/front_end/testcases/nnbd/forin.dart:16:18: Error: The type 'Object' used in the 'for' loop must implement 'Iterable<dynamic>'.
//  - 'Object' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   [for (int x in o1) x];
//                  ^
//
// pkg/front_end/testcases/nnbd/forin.dart:18:17: Error: The type 'Object?' used in the 'for' loop must implement 'Iterable<dynamic>'.
//  - 'Object' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   for (int x in o2) x;
//                 ^
//
// pkg/front_end/testcases/nnbd/forin.dart:19:18: Error: The type 'Object?' used in the 'for' loop must implement 'Iterable<dynamic>'.
//  - 'Object' is from 'dart:core'.
//  - 'Iterable' is from 'dart:core'.
//   [for (int x in o2) x];
//                  ^
//
import self as self;
import "dart:core" as core;

static method error(core::Iterable<core::int>? i2, core::List<core::int>? l2, core::Object o1, core::Object? o2) → dynamic {
  {
    core::Iterator<dynamic> :sync-for-iterator = (let final Never #t1 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:9:17: Error: The type 'Iterable<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'Iterable<int>?' is nullable and 'Iterable<dynamic>' isn't.
 - 'Iterable' is from 'dart:core'.
  for (int x in i2) x;
                ^" in let core::Iterable<core::int>? #t2 = i2 in #t2.==(null) ?{core::Iterable<dynamic>} #t2 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic> : #t2{core::Iterable<dynamic>}).{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      core::int x = :sync-for-iterator.{core::Iterator::current};
      x;
    }
  }
  block {
    final core::List<core::int> #t3 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<dynamic> :sync-for-iterator = (let final Never #t4 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:10:18: Error: The type 'Iterable<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'Iterable<int>?' is nullable and 'Iterable<dynamic>' isn't.
 - 'Iterable' is from 'dart:core'.
  [for (int x in i2) x];
                 ^" in let core::Iterable<core::int>? #t5 = i2 in #t5.==(null) ?{core::Iterable<dynamic>} #t5 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic> : #t5{core::Iterable<dynamic>}).{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        core::int x = :sync-for-iterator.{core::Iterator::current};
        #t3.{core::List::add}(x){(core::int) → void};
      }
    }
  } =>#t3;
  {
    core::Iterator<dynamic> :sync-for-iterator = (let final Never #t6 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:12:17: Error: The type 'List<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'List<int>?' is nullable and 'Iterable<dynamic>' isn't.
 - 'List' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  for (int x in l2) x;
                ^" in let core::List<core::int>? #t7 = l2 in #t7.==(null) ?{core::Iterable<dynamic>} #t7 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic> : #t7{core::Iterable<dynamic>}).{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      core::int x = :sync-for-iterator.{core::Iterator::current};
      x;
    }
  }
  block {
    final core::List<core::int> #t8 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<dynamic> :sync-for-iterator = (let final Never #t9 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:13:18: Error: The type 'List<int>?' used in the 'for' loop must implement 'Iterable<dynamic>' because 'List<int>?' is nullable and 'Iterable<dynamic>' isn't.
 - 'List' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  [for (int x in l2) x];
                 ^" in let core::List<core::int>? #t10 = l2 in #t10.==(null) ?{core::Iterable<dynamic>} #t10 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic> : #t10{core::Iterable<dynamic>}).{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        core::int x = :sync-for-iterator.{core::Iterator::current};
        #t8.{core::List::add}(x){(core::int) → void};
      }
    }
  } =>#t8;
  {
    core::Iterator<dynamic> :sync-for-iterator = (let final Never #t11 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:15:17: Error: The type 'Object' used in the 'for' loop must implement 'Iterable<dynamic>'.
 - 'Object' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  for (int x in o1) x;
                ^" in o1 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      final dynamic #t12 = :sync-for-iterator.{core::Iterator::current};
      {
        core::int x = #t12 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
        x;
      }
    }
  }
  block {
    final core::List<core::int> #t13 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<dynamic> :sync-for-iterator = (let final Never #t14 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:16:18: Error: The type 'Object' used in the 'for' loop must implement 'Iterable<dynamic>'.
 - 'Object' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  [for (int x in o1) x];
                 ^" in o1 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        final dynamic #t15 = :sync-for-iterator.{core::Iterator::current};
        {
          core::int x = #t15 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
          #t13.{core::List::add}(x){(core::int) → void};
        }
      }
    }
  } =>#t13;
  {
    core::Iterator<dynamic> :sync-for-iterator = (let final Never #t16 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:18:17: Error: The type 'Object?' used in the 'for' loop must implement 'Iterable<dynamic>'.
 - 'Object' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  for (int x in o2) x;
                ^" in o2 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      final dynamic #t17 = :sync-for-iterator.{core::Iterator::current};
      {
        core::int x = #t17 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
        x;
      }
    }
  }
  block {
    final core::List<core::int> #t18 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<dynamic> :sync-for-iterator = (let final Never #t19 = invalid-expression "pkg/front_end/testcases/nnbd/forin.dart:19:18: Error: The type 'Object?' used in the 'for' loop must implement 'Iterable<dynamic>'.
 - 'Object' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
  [for (int x in o2) x];
                 ^" in o2 as{TypeError,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        final dynamic #t20 = :sync-for-iterator.{core::Iterator::current};
        {
          core::int x = #t20 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
          #t18.{core::List::add}(x){(core::int) → void};
        }
      }
    }
  } =>#t18;
}
static method ok(core::Iterable<core::int> i1, core::List<core::int> l1, dynamic d) → dynamic {
  {
    core::Iterator<core::int> :sync-for-iterator = i1.{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      core::int x = :sync-for-iterator.{core::Iterator::current};
      x;
    }
  }
  block {
    final core::List<core::int> #t21 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<core::int> :sync-for-iterator = i1.{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        core::int x = :sync-for-iterator.{core::Iterator::current};
        #t21.{core::List::add}(x){(core::int) → void};
      }
    }
  } =>#t21;
  {
    core::Iterator<core::int> :sync-for-iterator = l1.{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      core::int x = :sync-for-iterator.{core::Iterator::current};
      x;
    }
  }
  block {
    final core::List<core::int> #t22 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<core::int> :sync-for-iterator = l1.{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        core::int x = :sync-for-iterator.{core::Iterator::current};
        #t22.{core::List::add}(x){(core::int) → void};
      }
    }
  } =>#t22;
  {
    core::Iterator<dynamic> :sync-for-iterator = (d as{TypeError,ForDynamic,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
    for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
      final dynamic #t23 = :sync-for-iterator.{core::Iterator::current};
      {
        core::int x = #t23 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
        x;
      }
    }
  }
  block {
    final core::List<core::int> #t24 = core::_GrowableList::•<core::int>(0);
    {
      core::Iterator<dynamic> :sync-for-iterator = (d as{TypeError,ForDynamic,ForNonNullableByDefault} core::Iterable<dynamic>).{core::Iterable::iterator};
      for (; :sync-for-iterator.{core::Iterator::moveNext}(); ) {
        final dynamic #t25 = :sync-for-iterator.{core::Iterator::current};
        {
          core::int x = #t25 as{TypeError,ForDynamic,ForNonNullableByDefault} core::int;
          #t24.{core::List::add}(x){(core::int) → void};
        }
      }
    }
  } =>#t24;
}
static method main() → dynamic {}