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LibJS: Don't coerce this value to object in Promise.prototype.finally()

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This commit is contained in:
Linus Groh 2021-11-14 01:01:08 +00:00
parent 53ec432e8d
commit 194d90dc72
2 changed files with 14 additions and 4 deletions
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10
Userland/Libraries/LibJS/Runtime/PromisePrototype.cpp
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@ -73,12 +73,14 @@ JS_DEFINE_NATIVE_FUNCTION(PromisePrototype::finally)
auto on_finally = vm.argument(0);
// 1. Let promise be the this value.
auto promise = vm.this_value(global_object);
// 2. If Type(promise) is not Object, throw a TypeError exception.
// FIXME: Don't coerce to object!
auto* promise = TRY(vm.this_value(global_object).to_object(global_object));
if (!promise.is_object())
return vm.throw_completion<TypeError>(global_object, ErrorType::NotAnObject, promise.to_string_without_side_effects());
// 3. Let C be ? SpeciesConstructor(promise, %Promise%).
auto* constructor = TRY(species_constructor(global_object, *promise, *global_object.promise_constructor()));
auto* constructor = TRY(species_constructor(global_object, promise.as_object(), *global_object.promise_constructor()));
// 4. Assert: IsConstructor(C) is true.
VERIFY(constructor);
@ -150,7 +152,7 @@ JS_DEFINE_NATIVE_FUNCTION(PromisePrototype::finally)
}
// 7. Return ? Invoke(promise, "then", « thenFinally, catchFinally »).
return TRY(Value(promise).invoke(global_object, vm.names.then, then_finally, catch_finally));
return TRY(promise.invoke(global_object, vm.names.then, then_finally, catch_finally));
}
}