Errors emitted by `react-scripts build` don't include any trace after upgrading to `5.0.0`

[corymharper]

I'm not sure if this is a bug or intended so I've marked it as a question for now...

I am upgrading an application from 4.0.3 to 5.0.0, one thing we noticed immediately however, is that build errors no longer include any kind of file trace with them, here's an example:

4.0.3:

/src/components/app.tsx
TypeScript error in /src/components/app.tsx(22,2):
'faPaperPlane' is declared but its value is never read.  TS6133

    20 | import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
    21 | import {
  > 22 | 	faPaperPlane,
       | 	^
    23 | 	faHandPointRight,
    24 | 	faLocationCircle,
    25 | 	faKey,

5.0.0

TS6133: 'faPaperPlane' is declared but its value is never read.
    20 | import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
    21 | import {
  > 22 | 	faPaperPlane,
       | 	^^^^^^^^^^^^
    23 | 	faHandPointRight,
    24 | 	faLocationCircle,
    25 | 	faKey,

The former is a lot more convenient to debug than the latter, and I'm not sure what about upgrading has caused the error to be less verbose, but is there something I'm missing, or a change I need to make since upgrading?

[slowWriting]

For me it looks like this:

ERROR in src/library/components/controls/search/SearchBox/SearchBox.tsx:2:1
TS6133: 'React' is declared but its value is never read.
   1 | import { Paper, Typography } from '@mui/material';
 > 2 | import * as React from 'react';
     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   3 | import {
   4 |         InputWithButton,
   5 |         InputWithButtonProps,

I have no trace when it is first line:

 ERROR in src/library/components/controls/form/ControlledAutocomplete.tsx
 TS6133: 'React' is declared but its value is never read.

which version of typescript do you have?

[corymharper]

For me it looks like this:

ERROR in src/library/components/controls/search/SearchBox/SearchBox.tsx:2:1
TS6133: 'React' is declared but its value is never read.
   1 | import { Paper, Typography } from '@mui/material';
 > 2 | import * as React from 'react';
     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   3 | import {
   4 |         InputWithButton,
   5 |         InputWithButtonProps,

I have no trace when it is first line:

 ERROR in src/library/components/controls/form/ControlledAutocomplete.tsx
 TS6133: 'React' is declared but its value is never read.

which version of typescript do you have?

We are currently on 4.3.5.

[corymharper]

I wanted to try from a blank project and got the same results, steps I followed:

1. npx create-react-app my-app --template typescript
2. Purposely wrote a simple error into the code: const test: number = null;
3. npm run build
4. Resulting error:

TS2322: Type 'null' is not assignable to type 'number'.
    4 |
    5 | function App() {
  > 6 |   const test: number = null;
      |         ^^^^
    7 |   console.log(test);
    8 |
    9 |   return (

5. npm install react-scripts@4.0.3
6. npm run build
7. Resulting error:

/my-app/src/App.tsx
TypeScript error in /my-app/src/App.tsx(6,9):
Type 'null' is not assignable to type 'number'.  TS2322

    4 | 
    5 | function App() {
  > 6 |   const test: number = null;
      |         ^
    7 |   console.log(test);
    8 | 
    9 |   return (

The Typescript version in the project was 4.5.5.