| library test; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/inference/future_then_upwards_2.dart:21:51: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'MyFuture<int>'. | 
 | //  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards_2.dart'. | 
 | //   MyFuture<int> f2 = /*error:INVALID_ASSIGNMENT*/ f; | 
 | //                                                   ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 | import "dart:async" as asy; | 
 |  | 
 | import "dart:async"; | 
 |  | 
 | class MyFuture<T extends core::Object* = dynamic> extends core::Object implements asy::Future<self::MyFuture::T*> { | 
 |   constructor •() → self::MyFuture<self::MyFuture::T*>* | 
 |     : super core::Object::•() {} | 
 |   constructor value(self::MyFuture::T* x) → self::MyFuture<self::MyFuture::T*>* | 
 |     : super core::Object::•() {} | 
 |   method noSuchMethod(core::Invocation* invocation) → dynamic | 
 |     return null; | 
 |   method then<S extends core::Object* = dynamic>((self::MyFuture::T*) →* FutureOr<self::MyFuture::then::S*>* f, {core::Function* onError = #C1}) → self::MyFuture<self::MyFuture::then::S*>* | 
 |     return null; | 
 |   abstract member-signature get _identityHashCode() → core::int*; | 
 |   abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; | 
 |   abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; | 
 |   abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; | 
 |   abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; | 
 |   abstract member-signature operator ==(dynamic other) → core::bool*; | 
 |   abstract member-signature get hashCode() → core::int*; | 
 |   abstract member-signature method toString() → core::String*; | 
 |   abstract member-signature get runtimeType() → core::Type*; | 
 |   member-signature no-such-method-forwarder method catchError(core::Function* onError, {(core::Object*) →* core::bool* test = #C1}) → asy::Future<self::MyFuture::T*>* | 
 |     return this.{self::MyFuture::noSuchMethod}(new core::_InvocationMirror::_withType(#C2, 0, #C3, core::List::unmodifiable<dynamic>(<dynamic>[onError]), core::Map::unmodifiable<core::Symbol*, dynamic>(<core::Symbol*, dynamic>{#C4: test}))) as{TypeError,ForDynamic} asy::Future<self::MyFuture::T*>*; | 
 |   member-signature no-such-method-forwarder method whenComplete(() →* FutureOr<void>* action) → asy::Future<self::MyFuture::T*>* | 
 |     return this.{self::MyFuture::noSuchMethod}(new core::_InvocationMirror::_withType(#C5, 0, #C3, core::List::unmodifiable<dynamic>(<dynamic>[action]), core::Map::unmodifiable<core::Symbol*, dynamic>(#C7))) as{TypeError,ForDynamic} asy::Future<self::MyFuture::T*>*; | 
 |   member-signature no-such-method-forwarder method asStream() → asy::Stream<self::MyFuture::T*>* | 
 |     return this.{self::MyFuture::noSuchMethod}(new core::_InvocationMirror::_withType(#C8, 0, #C3, #C6, core::Map::unmodifiable<core::Symbol*, dynamic>(#C7))) as{TypeError,ForDynamic} asy::Stream<self::MyFuture::T*>*; | 
 |   member-signature no-such-method-forwarder method timeout(core::Duration* timeLimit, {generic-covariant-impl () →* FutureOr<self::MyFuture::T*>onTimeout = #C1}) → asy::Future<self::MyFuture::T*>* | 
 |     return this.{self::MyFuture::noSuchMethod}(new core::_InvocationMirror::_withType(#C9, 0, #C3, core::List::unmodifiable<dynamic>(<dynamic>[timeLimit]), core::Map::unmodifiable<core::Symbol*, dynamic>(<core::Symbol*, dynamic>{#C10: onTimeout}))) as{TypeError,ForDynamic} asy::Future<self::MyFuture::T*>*; | 
 | } | 
 | static method main() → void { | 
 |   self::MyFuture<core::double*>* f = self::foo().{self::MyFuture::then}<core::double*>((dynamic _) → core::double* => 2.3); | 
 |   self::MyFuture<core::int*>* f2 = let final<BottomType> #t1 = invalid-expression "pkg/front_end/testcases/inference/future_then_upwards_2.dart:21:51: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'MyFuture<int>'. | 
 |  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards_2.dart'. | 
 |   MyFuture<int> f2 = /*error:INVALID_ASSIGNMENT*/ f; | 
 |                                                   ^" in f as{TypeError} self::MyFuture<core::int*>*; | 
 |   self::MyFuture<core::num*>* f3 = self::foo().{self::MyFuture::then}<core::double*>((dynamic _) → core::double* => 2.3); | 
 | } | 
 | static method foo() → self::MyFuture<dynamic>* | 
 |   return new self::MyFuture::value<core::int*>(1); | 
 |  | 
 | constants  { | 
 |   #C1 = null | 
 |   #C2 = #catchError | 
 |   #C3 = <core::Type*>[] | 
 |   #C4 = #test | 
 |   #C5 = #whenComplete | 
 |   #C6 = <dynamic>[] | 
 |   #C7 = core::_ImmutableMap<core::Symbol*, dynamic> {_kvPairs:#C6} | 
 |   #C8 = #asStream | 
 |   #C9 = #timeout | 
 |   #C10 = #onTimeout | 
 | } |