Source maps are mis-aligned

🐛 Bug Report

Jest errors that show line numbers and code snippets aren’t showing the right thing.

This seems to happen by merely including another package that already loads source-map-support module prior, for example pino-caller. You can see the code for pino-caller is very simple, and in fact no code paths get triggered, other than just the loading of the module itself.

When I comment out the require line in pino-caller, the source maps align fine.

I’ve looked at other source maps issues here, and none of them seem to be relevant to this.

To Reproduce

require('pino-caller')

describe('Name of the group', () => {
  it('should work', () => {
    // comment

    throw new Error('foo')
  })
})

Results in:

      4 |   it('should work', () => {
      5 |     // comment
    > 6 |
        | ^
      7 |     throw new Error('foo')
      8 |   })
      9 | })

      at Object.<anonymous> (test/foo.test.ts:6:15)

Expected behavior

To point to the right line of code.

Link to repo (highly encouraged)

Can create, if necessary.

envinfo

System:
    OS: macOS

Npm packages:
    jest: 26.1.0
    ts-jest: 26.1.3
    typescript: 3.8.3
    babel(optional): N/A

[ahnpnl]

Oh actually I was asking whether or not that source-map-support is needed for your code 😃 It seems like not needed.

Will need to check whether it is jest bug or ts-jest, will keep you update

[moltar]

Ok, thanks!