tests/cases/compiler/mappedTypeAsStringTemplate.ts(7,5): error TS2345: Argument of type '{ x: number; }' is not assignable to parameter of type '{ xy: number; }'.
  Property 'xy' is missing in type '{ x: number; }' but required in type '{ xy: number; }'.


==== tests/cases/compiler/mappedTypeAsStringTemplate.ts (1 errors) ====
    // Repro from #44220
    
    function foo<T extends { [K in keyof T as `${Extract<K, string>}y`]: number }>(foox: T) { }
    
    const c = { x: 1 };
    
    foo(c);
        ~
!!! error TS2345: Argument of type '{ x: number; }' is not assignable to parameter of type '{ xy: number; }'.
!!! error TS2345:   Property 'xy' is missing in type '{ x: number; }' but required in type '{ xy: number; }'.
    