Compilation error with Typescript 2.6 and strictFunctionTypes on

[mikeyoon]

With typescript 2.6 and --strictFunctionTypes enabled in tsconfig, there's a compilation error in rxjs/scheduler/VirtualTimeScheduler.d.ts. Error is as follows:

(22,22): error TS2415: Class 'VirtualAction<T>' incorrectly extends base class 'AsyncAction<T>'.
  Types of property 'work' are incompatible.
    Type '(this: VirtualAction<T>, state?: T) => void' is not assignable to type '(this: AsyncAction<T>, state?: T) => void'.
      The 'this' types of each signature are incompatible.
        Type 'AsyncAction<T>' is not assignable to type 'VirtualAction<T>'.
          Property 'index' is missing in type 'AsyncAction<T>'.

Looking at the code, removing the this parameter in work function would fix the issue, but I assume there's some reason for explicitly typing this.

[mikeyoon]

Looks like this is the wrong repo for this.