tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractInheritance.ts(13,7): error TS2515: Non-abstract class 'CC' does not implement inherited abstract member 'foo' from class 'AA'.
tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractInheritance.ts(15,7): error TS2515: Non-abstract class 'DD' does not implement inherited abstract member 'foo' from class 'BB'.
tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractInheritance.ts(19,7): error TS2515: Non-abstract class 'FF' does not implement inherited abstract member 'foo' from class 'CC'.


==== tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractInheritance.ts (3 errors) ====
    abstract class A {}
    
    abstract class B extends A {}
    
    class C extends A {}
    
    abstract class AA {
        abstract foo();
    }
    
    abstract class BB extends AA {}
    
    class CC extends AA {}
          ~~
!!! error TS2515: Non-abstract class 'CC' does not implement inherited abstract member 'foo' from class 'AA'.
    
    class DD extends BB {}
          ~~
!!! error TS2515: Non-abstract class 'DD' does not implement inherited abstract member 'foo' from class 'BB'.
    
    abstract class EE extends BB {}
    
    class FF extends CC {}
          ~~
!!! error TS2515: Non-abstract class 'FF' does not implement inherited abstract member 'foo' from class 'CC'.
    
    abstract class GG extends CC {}