errorInUnnamedClassExpression.ts(5,14): error TS2715: Abstract property 'bar' in class 'Foo' cannot be accessed in the constructor.
errorInUnnamedClassExpression.ts(7,5): error TS1253: Abstract properties can only appear within an abstract class.
errorInUnnamedClassExpression.ts(7,14): error TS7008: Member 'bar' implicitly has an 'any' type.


==== errorInUnnamedClassExpression.ts (3 errors) ====
    // https://github.com/microsoft/TypeScript/issues/62920
    
    let Foo = class {
        constructor() {
            this.bar++;
                 ~~~
!!! error TS2715: Abstract property 'bar' in class 'Foo' cannot be accessed in the constructor.
        }
        abstract bar;
        ~~~~~~~~
!!! error TS1253: Abstract properties can only appear within an abstract class.
                 ~~~
!!! error TS7008: Member 'bar' implicitly has an 'any' type.
    };
    