babel/packages/babel-parser/test/fixtures/experimental/pipeline-operator/hack-hash-proposal-topic-then-digit/options.json

{
  "plugins": [
    [
      "pipelineOperator",
      {
        "proposal": "hack",
        "topicToken": "#"
      }
    ]
  ],
  "throws": "Unexpected digit after hash token. (1:5)"
}