Cannot read property 'target' of null

I’ve probably misconfigured something, but when I simply run backport --verbose it fails with:

✖ Loading commits...
TypeError: Cannot read property 'target' of null
    at Object.fetchCommitsByAuthor (/Users/rkorving/Projects/redacted/node_modules/backport/dist/services/github/fetchCommitsByAuthor.js:95:31)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)

which translates to https://github.com/sqren/backport/blob/2a100ccfe1c339ead0f3c985e920e19bcd4d11f3/src/services/github/fetchCommitsByAuthor.ts#L108

When I look in the verbose log, the last steps I see are:

2019-10-08T07:56:48.850Z verbose: {
  "repoOwner": "redacted-but-correct",
  "repoName": "redacted-but-correct",
  "commitsCount": 10,
  "authorId": "redacted-but-some-correct-looking-hash",
  "historyPath": null
}
2019-10-08T07:56:49.303Z verbose: {
  "data": {
    "repository": {
      "ref": null
    }
  }
}

I use github.com, a private repo, and I know I have commits in its history. I enabled these scopes when creating a token for it:

My project’s .backportrc.json file:

{
  "upstream": "myorg/myrepo",
  "branches": ["v0-master"],
  "all": true,
  "fork": true,
  "multipleCommits": true,
  "multipleBranches": true,
  "labels": ["backport"]
}

(I’ve tried with "all": false as well, but same result)

Backport v4.7.3.

[sqren]

@ronkorving I’ve started a PR in #160. You can try it out by installing the beta version

yarn global add backport@beta or npm install -g backport@beta

LMK how it goes 🤞

[ronkorving]

@sqren Assuming you’re onboard, shall we make a new issue for this?