Failing test in node 9.9.0

[SimenB]

Do you want to request a feature or report a bug?
Bug, I guess

What is the current behavior?
The test packages/jest-cli/src/__tests__/search_source.test.js fails using node 9.9.0, but passes on node 9.8.0 (and it also passes on node 6 and 8).

The test failing was added in #5224.

  ● SearchSource › testPathsMatching › finds tests with parentheses in their rootDir when using testMatch

    expect(received).toEqual(expected)

    Expected value to equal:
      [StringContaining "__testtests__/test.js"]
    Received:
      []

    Difference:

    - Expected
    + Received

    - Array [
    -   StringContaining "__testtests__/test.js",
    - ]
    + Array []

My shot in the dark is that somehow this regex has changed behavior: https://github.com/facebook/jest/blob/2bd5dfddfef425348760807d12348829a9a82d30/packages/jest-config/src/utils.js#L51-L53

If the current behavior is a bug, please provide the steps to reproduce and
either a repl.it demo through https://repl.it/languages/jest or a minimal
repository on GitHub that we can yarn install and yarn test.
N/A

What is the expected behavior?
It should pass on node 9.9.0 as well.

Please provide your exact Jest configuration

https://github.com/facebook/jest/tree/2bd5dfddfef425348760807d12348829a9a82d30

[SimenB]

Fixed in node master: nodejs/node#19520

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