TypeError in Scheduler

[NiKlimenko]

RxJS version: 5.5.6

Code to reproduce:

import {observeOn} from 'rxjs/operators/observeOn';
import {Scheduler} from 'rxjs/Rx';

someObservable.pipe(
     observeOn(Scheduler.asap)
   )
     .subscribe(() => {});

Expected behavior:
Should work correctly, without compilation errors.

Actual behavior:

ERROR in node_modules/rxjs/scheduler/VirtualTimeScheduler.d.ts(24,15): error TS2416: Property 'work' in type 'VirtualAction<T>' is not assignable to the same property in base type
'AsyncAction<T>'.
  Type '(this: VirtualAction<T>, state?: T | undefined) => void' is not assignable to type '(this: AsyncAction<T>, state?: T | undefined) => 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>'.

Additional information:
TypeScript 2.7

[kwonoj]

Dupe of #3031 .

[lock]

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