tests/cases/compiler/incompatibleGenericTypes.ts(10,5): error TS2322: Type 'I1<boolean>' is not assignable to type 'I1<number>'.
  Type 'boolean' is not assignable to type 'number'.


==== tests/cases/compiler/incompatibleGenericTypes.ts (1 errors) ====
    
    interface I1<T> {
    
      m1<U>(callback: (p: T) => U): I1<U>;
    
    }
     
    var v1: I1<boolean>;
     
    var v2: I1<number> = v1;
        ~~
!!! error TS2322: Type 'I1<boolean>' is not assignable to type 'I1<number>'.
!!! error TS2322:   Type 'boolean' is not assignable to type 'number'.