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tests/cases/compiler/varianceAnnotationValidation.ts(5,22): error TS2636: Type 'Controller<sub-T>' is not assignable to type 'Controller<super-T>' as implied by variance annotation.
Types of property 'run' are incompatible.
Type '(animal: sub-T) => void' is not assignable to type '(animal: super-T) => void'.
Types of parameters 'animal' and 'animal' are incompatible.
Type 'super-T' is not assignable to type 'sub-T'.
tests/cases/compiler/varianceAnnotationValidation.ts(27,1): error TS2322: Type 'AnimalContainer<Animal>' is not assignable to type 'AnimalContainer<Dog>'.
Property 'bark' is missing in type 'Animal' but required in type 'Dog'.
==== tests/cases/compiler/varianceAnnotationValidation.ts (2 errors) ====
// Repro from #49607
// Variance annotation error expected
interface Controller<out T> {
~~~~~
!!! error TS2636: Type 'Controller<sub-T>' is not assignable to type 'Controller<super-T>' as implied by variance annotation.
!!! error TS2636: Types of property 'run' are incompatible.
!!! error TS2636: Type '(animal: sub-T) => void' is not assignable to type '(animal: super-T) => void'.
!!! error TS2636: Types of parameters 'animal' and 'animal' are incompatible.
!!! error TS2636: Type 'super-T' is not assignable to type 'sub-T'.
createAnimal: () => T;
run: (animal: T) => void;
}
interface Animal {
run(): void;
};
class Dog implements Animal {
run() {};
bark() {};
}
interface AnimalContainer<T> {
controller: Controller<T>;
}
declare let ca: AnimalContainer<Animal>;
declare let cd: AnimalContainer<Dog>;
ca = cd; // Ok
cd = ca; // Error
~~
!!! error TS2322: Type 'AnimalContainer<Animal>' is not assignable to type 'AnimalContainer<Dog>'.
!!! error TS2322: Property 'bark' is missing in type 'Animal' but required in type 'Dog'.
!!! related TS2728 tests/cases/compiler/varianceAnnotationValidation.ts:16:2: 'bark' is declared here.
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