TS 3.4: Error when passing dynamically imported generic type as a function argument

TypeScript Version: 3.4.0-dev.201xxxxx

Search Terms: TS2322, dynamic import, dynamic import never, dynamic import generic

Code

 .\node_modules\.bin\tsc --jsx react --lib es2017 --strict index.tsx

// ===== page.tsx ======
import * as React from 'react'

export interface PageProps {
    title: string
}

export class Page extends React.Component<PageProps> {
    render() {
        return <div>{this.props.title}</div>
    }
}

// ===== index.tsx =====
import * as React from 'react'
import{ PageProps, Page } from './page'

export function myFunction<TProps>(loader: () => Promise<React.ComponentType<TProps>>) {

}

// No error
myFunction(() => Promise.resolve(Page))

// No error
const loader: () => Promise<React.ComponentType<PageProps>> = () => import('./page').then(m => m.Page)

// Error
myFunction(() => import('./page').then(m => m.Page))

Expected behavior:

No compile error. This was the behavior in TS 3.3 and earlier.

Actual behavior:

There is an error after upgrading to TS 3.4:

index.tsx:14:18 - error TS2322: Type 'Promise<typeof Page | ComponentClass<never, any> | FunctionComponen
t<never>>' is not assignable to type 'Promise<ComponentType<PageProps>>'.
  Type 'typeof Page | ComponentClass<never, any> | FunctionComponent<never>' is not assignable to type 'C
omponentType<PageProps>'.
    Type 'ComponentClass<never, any>' is not assignable to type 'ComponentType<PageProps>'.
      Type 'ComponentClass<never, any>' is not assignable to type 'ComponentClass<PageProps, any>'.
        Type 'PageProps' is not assignable to type 'never'.

14 myFunction(() => import('./page').then(m => m.Page))
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  index.tsx:4:44
    4 export function myFunction<TProps>(loader: () => Promise<React.ComponentType<TProps>>) {
                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    The expected type comes from the return type of this signature.

Repro here: https://github.com/srmagura/ts-import-repro

Reproduce the error with the tsc command against index.tsx and page.tsx, using the dynamic import and generic function shown in the issue. Compare the behavior with TypeScript 3.3 and 3.4, then trace generic inference for the Promise<ComponentType> return type. Done means the reported call compiles without the TS2322 error while the existing examples still behave correctly.