tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithObjectLiteral.ts(35,10): error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
  Type argument candidate 'E1' is not a valid type argument because it is not a supertype of candidate 'E2'.


==== tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithObjectLiteral.ts (1 errors) ====
    interface Computed<T> {
        read(): T;
        write(value: T);
    }
    
    function foo<T>(x: Computed<T>) { }
    
    var s: string;
    
    // Calls below should infer string for T and then assign that type to the value parameter
    foo({
        read: () => s,
        write: value => s = value
    });
    foo({
        write: value => s = value,
        read: () => s
    });
    
    enum E1 { X }
    enum E2 { X }
    
    // Check that we infer from both a.r and b before fixing T in a.w
    
    declare function f1<T, U>(a: { w: (x: T) => U; r: () => T; }, b: T): U;
    
    var v1: number;
    var v1 = f1({ w: x => x, r: () => 0 }, 0);
    var v1 = f1({ w: x => x, r: () => 0 }, E1.X);
    var v1 = f1({ w: x => x, r: () => E1.X }, 0);
    
    var v2: E1;
    var v2 = f1({ w: x => x, r: () => E1.X }, E1.X);
    
    var v3 = f1({ w: x => x, r: () => E1.X }, E2.X);  // Error
             ~~
!!! error TS2453: The type argument for type parameter 'T' cannot be inferred from the usage. Consider specifying the type arguments explicitly.
!!! error TS2453:   Type argument candidate 'E1' is not a valid type argument because it is not a supertype of candidate 'E2'.