CRA2 recommended config hits random break points in VS Code

Created by: ryan-mars

Is this a bug report?

Yes

Did you try recovering your dependencies?

Yes

npm --version 6.4.1 yarn --version 1.10.1

Which terms did you search for in User Guide?

"vs code" debugger breakpoints

Environment

  System:
    OS: macOS 10.14
    CPU: x64 Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz
  Binaries:
    Node: 10.10.0 - ~/.nvm/versions/node/v10.10.0/bin/node
    Yarn: 1.10.1 - ~/.nvm/versions/node/v10.10.0/bin/yarn
    npm: 6.4.1 - ~/.nvm/versions/node/v10.10.0/bin/npm
  Browsers:
    Chrome: 69.0.3497.100
    Safari: 12.0
  npmPackages:
    react: ^16.5.2 => 16.5.2 
    react-dom: ^16.5.2 => 16.5.2 
    react-scripts: 2.0.4 => 2.0.4 
  npmGlobalPackages:
    create-react-app: 2.0.2

Steps to Reproduce

1. Install VS Code 1.27.2 or 1.26.1
2. npx create-react-app debug-cra2
3. Add recommended Debug CRA Tests snippet to .vscode/launch.json
4. Add the snippet below to src/App.test.js
5. Set breakpoint on line 13 console.log({ foo })
6. Hit F5 and debug

Snippet for App.test.js

it('should find the breakpoint', () => {
  const foo = 'bar'
  console.log({ foo })
  expect(foo).toBe('bar')
})

it('should find the other breakpoint', () => {
  const foo = 'bar'
  console.log({ foo })
  expect(foo).toBe('bar')
})

Expected Behavior

Execution stops on line 13

Actual Behavior

Execution stops on line 6 or 7, it's inconsistent.

Reproducible Demo

https://github.com/ryanwmarsh/debug-cra2