==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints.ts (94 errors) ====
    // checking whether other types are subtypes of type parameters with constraints
    
    class C3<T> {
        foo: T;
    }
    
    class D1<T extends U, U> extends C3<T> {
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: T; // ok
    }
    
    class D2<T extends U, U> extends C3<U> {
          ~~
!!! Class 'D2<T, U>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'U'.
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: T; // ok
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'U'.
    }
    
    class D3<T extends U, U> extends C3<T> {
          ~~
!!! Class 'D3<T, U>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'U' is not assignable to type 'T'.
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: U; // error
        ~~~~~~~
!!! Property 'foo' of type 'U' is not assignable to string index type 'T'.
    }
    
    class D4<T extends U, U> extends C3<U> {
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: U; // ok
    }
    
    
    // V > U > T
    // test if T is subtype of T, U, V
    // should all work
    class D5<T extends U, U extends V, V> extends C3<T> {
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                          ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: T; // ok
    }
    
    class D6<T extends U, U extends V, V> extends C3<U> {
          ~~
!!! Class 'D6<T, U, V>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'U'.
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                          ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: T;
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'U'.
    }
    
    class D7<T extends U, U extends V, V> extends C3<V> {
          ~~
!!! Class 'D7<T, U, V>' incorrectly extends base class 'C3<V>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'V'.
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                          ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: T; // ok
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'V'.
    }
    
    // test if U is a subtype of T, U, V
    // only a subtype of V and itself
    class D8<T extends U, U extends V, V> extends C3<T> {
          ~~
!!! Class 'D8<T, U, V>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'U' is not assignable to type 'T'.
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                          ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: U; // error
        ~~~~~~~
!!! Property 'foo' of type 'U' is not assignable to string index type 'T'.
    }
    
    class D9<T extends U, U extends V, V> extends C3<U> {
             ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                          ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: U; // ok
    }
    
    class D10<T extends U, U extends V, V> extends C3<V> {
          ~~~
!!! Class 'D10<T, U, V>' incorrectly extends base class 'C3<V>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'U' is not assignable to type 'V'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: U; // ok
        ~~~~~~~
!!! Property 'foo' of type 'U' is not assignable to string index type 'V'.
    }
    
    // test if V is a subtype of T, U, V
    // only a subtype of itself
    class D11<T extends U, U extends V, V> extends C3<T> {
          ~~~
!!! Class 'D11<T, U, V>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'V' is not assignable to type 'T'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: V; // error
        ~~~~~~~
!!! Property 'foo' of type 'V' is not assignable to string index type 'T'.
    }
    
    class D12<T extends U, U extends V, V> extends C3<U> {
          ~~~
!!! Class 'D12<T, U, V>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'V' is not assignable to type 'U'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: V; // error
        ~~~~~~~
!!! Property 'foo' of type 'V' is not assignable to string index type 'U'.
    }
    
    class D13<T extends U, U extends V, V> extends C3<V> {
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: V; // ok
    }
    
    // Date > V > U > T
    // test if T is subtype of T, U, V, Date
    // should all work
    class D14<T extends U, U extends V, V extends Date> extends C3<Date> {
          ~~~
!!! Class 'D14<T, U, V>' incorrectly extends base class 'C3<Date>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'Date'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: Date;
        foo: T; // ok
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'Date'.
    }
    
    class D15<T extends U, U extends V, V extends Date> extends C3<T> {
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: T; // ok
    }
    
    class D16<T extends U, U extends V, V extends Date> extends C3<U> {
          ~~~
!!! Class 'D16<T, U, V>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'U'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: T;
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'U'.
    }
    
    class D17<T extends U, U extends V, V extends Date> extends C3<V> {
          ~~~
!!! Class 'D17<T, U, V>' incorrectly extends base class 'C3<V>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'V'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: T;
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'V'.
    }
    
    // test if U is a subtype of T, U, V, Date
    // only a subtype of V, Date and itself
    class D18<T extends U, U extends V, V extends Date> extends C3<Date> {
          ~~~
!!! Class 'D18<T, U, V>' incorrectly extends base class 'C3<Date>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'Date'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: Date;
        foo: T; // ok
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'Date'.
    }
    
    class D19<T extends U, U extends V, V extends Date> extends C3<T> {
          ~~~
!!! Class 'D19<T, U, V>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'U' is not assignable to type 'T'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: U; // error
        ~~~~~~~
!!! Property 'foo' of type 'U' is not assignable to string index type 'T'.
    }
    
    class D20<T extends U, U extends V, V extends Date> extends C3<U> {
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: U; // ok
    }
    
    class D21<T extends U, U extends V, V extends Date> extends C3<V> {
          ~~~
!!! Class 'D21<T, U, V>' incorrectly extends base class 'C3<V>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'U' is not assignable to type 'V'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: U;
        ~~~~~~~
!!! Property 'foo' of type 'U' is not assignable to string index type 'V'.
    }
    
    // test if V is a subtype of T, U, V, Date
    // only a subtype of itself and Date
    class D22<T extends U, U extends V, V extends Date> extends C3<Date> {
          ~~~
!!! Class 'D22<T, U, V>' incorrectly extends base class 'C3<Date>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'T' is not assignable to type 'Date'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: Date;
        foo: T; // ok
        ~~~~~~~
!!! Property 'foo' of type 'T' is not assignable to string index type 'Date'.
    }
    
    class D23<T extends U, U extends V, V extends Date> extends C3<T> {
          ~~~
!!! Class 'D23<T, U, V>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'V' is not assignable to type 'T'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: V; // error
        ~~~~~~~
!!! Property 'foo' of type 'V' is not assignable to string index type 'T'.
    }
    
    class D24<T extends U, U extends V, V extends Date> extends C3<U> {
          ~~~
!!! Class 'D24<T, U, V>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'V' is not assignable to type 'U'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: V; // error
        ~~~~~~~
!!! Property 'foo' of type 'V' is not assignable to string index type 'U'.
    }
    
    class D25<T extends U, U extends V, V extends Date> extends C3<V> {
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: V; // ok
    }
    
    // test if Date is a subtype of T, U, V, Date
    // only a subtype of itself
    class D26<T extends U, U extends V, V extends Date> extends C3<Date> {
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: Date;
        foo: Date; // ok
    }
    
    class D27<T extends U, U extends V, V extends Date> extends C3<T> {
          ~~~
!!! Class 'D27<T, U, V>' incorrectly extends base class 'C3<T>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'Date' is not assignable to type 'T'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: T;
        foo: Date; // error
        ~~~~~~~~~~
!!! Property 'foo' of type 'Date' is not assignable to string index type 'T'.
    }
    
    class D28<T extends U, U extends V, V extends Date> extends C3<U> {
          ~~~
!!! Class 'D28<T, U, V>' incorrectly extends base class 'C3<U>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'Date' is not assignable to type 'U'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: U;
        foo: Date; // error
        ~~~~~~~~~~
!!! Property 'foo' of type 'Date' is not assignable to string index type 'U'.
    }
    
    class D29<T extends U, U extends V, V extends Date> extends C3<V> {
          ~~~
!!! Class 'D29<T, U, V>' incorrectly extends base class 'C3<V>':
!!!   Types of property 'foo' are incompatible:
!!!     Type 'Date' is not assignable to type 'V'.
              ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
                           ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        [x: string]: V;
        foo: Date; // error
        ~~~~~~~~~~
!!! Property 'foo' of type 'Date' is not assignable to string index type 'V'.
    }