tests/cases/compiler/propertyAccess1.ts(3,5): error TS2339: Property 'b' does not exist on type '{ a: number; }'.


==== tests/cases/compiler/propertyAccess1.ts (1 errors) ====
    var foo: { a: number; };
    foo.a = 4;
    foo.b = 5;
        ~
!!! error TS2339: Property 'b' does not exist on type '{ a: number; }'.