Fresh install fails to compile

[AdamScura]

npm start fails to compile

Repro:

1. clone repo
2. open folder in vscode
3. npm install
4. npm start
5. observe failure message

Terminal output from npm start

> rsk-github-issues-example@0.1.0 start D:\Dev\rtk-github-issues-example
> react-scripts start

�[34mi�[39m �[90m｢wds｣�[39m: Project is running at http://0.0.0.0:3000/
�[34mi�[39m �[90m｢wds｣�[39m: webpack output is served from 
�[34mi�[39m �[90m｢wds｣�[39m: Content not from webpack is served from D:\Dev\rtk-github-issues-example\public
�[34mi�[39m �[90m｢wds｣�[39m: 404s will fallback to /
Starting the development server...

Failed to compile.

D:/Dev/rtk-github-issues-example/node_modules/jest-diff/build/diffLines.d.ts
TypeScript error in D:/Dev/rtk-github-issues-example/node_modules/jest-diff/build/diffLines.d.ts(8,13):
'=' expected.  TS1005

     6 |  */
     7 | import { Diff } from './cleanupSemantic';
  >  8 | import type { DiffOptions } from './types';
       |             ^
     9 | export declare const diffLinesUnified: (aLines: string[], bLines: string[], options?: DiffOptions | undefined) => string;
    10 | export declare const diffLinesUnified2: (aLinesDisplay: string[], bLinesDisplay: string[], aLinesCompare: string[], bLinesCompare: string[], options?: DiffOptions | undefined) => string;
    11 | export declare const diffLinesRaw: (aLines: string[], bLines: string[]) => Diff[];

I did some quick research and it seems to be related to this issue: https://stackoverflow.com/questions/59833120/parsing-error-expected-in-import-type

I'm guessing the latest version of jest is using a feature that is not fully supported by the typescript compiler. This commit was released 12 hours ago: jestjs/jest@4a59daa#diff-8b6cd0ec8c11f6c2366c3527788d8fe8

[AdamScura]

Yeah, these issues popped up today:

• jestjs/jest#9703
• facebook/create-react-app#8714

[afzalhussain23]

Upgrade @types/jest version to 25.2.1 to solve this error.