Method listLabelsOnIssue ignore "issue_number" and 404

[QJoly]

Bug Report

Current Behavior

Here is my code:

async function isLabelPresent(context, label) {
  const issue_number = context.payload.issue.number
  const owner = context.payload.repository.owner.login
  const repo = context.payload.repository.name

  console.log(`isLabelPresent : ${owner}/${repo}#${issue_number} `)

  const labels = await context.octokit.issues.listLabelsOnIssue({
    owner: owner,
    repo: repo,
    issue_number: issue_number
  })

  for (let i = 0; i < labels.data.length; i++) {
    if (labels.data[i].name === label) {
      console.log("Label " + label + " is already set")
      return true;
    }
  }
  console.log("Label " + label + " is not set")
  return false;
}

As soon as I call "listLabelsOnIssue", I get a 404 error because the variable issue_number is not used. However, the console.log shows me the owner, the repo and the issue_number (ex: isLabelPresent: RubxKube/charts#4).

RequestError [HttpError]: Not Found
    at /home/kiko/Documents/RubxKube/markdownify/node_modules/probot/node_modules/@octokit/request/dist-node/index.js:86:21
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async sendRequestWithRetries (/home/kiko/Documents/RubxKube/markdownify/node_modules/@octokit/auth-app/dist-node/index.js:398:12)
    at async Job.doExecute (/home/kiko/Documents/RubxKube/markdownify/node_modules/bottleneck/light.js:405:18) {
  status: 404,
  response: {
    url: 'https://api.github.com/repos/RubxKube/charts/issues//labels',
    status: 404,
    headers: {
      'access-control-allow-origin': '*',
      'access-control-expose-headers': 'ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Used, X-RateLimit-Resource, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type, X-GitHub-SSO, X-GitHub-Request-Id, Deprecation, Sunset',
      connection: 'close',
      'content-encoding': 'gzip',
      'content-security-policy': "default-src 'none'",
      'content-type': 'application/json; charset=utf-8',
      date: 'Fri, 30 Jun 2023 20:26:44 GMT',
...

Expected behavior/code

I'd like to check if a label is setted or not on a pull request. My function should be return True or False.

Environment

• Probot version(s): 12.3.1
• Node/npm version: Node.js v18.16.1
• OS: Pop OS

Possible Solution

Additional context/Screenshots
Add any other context about the problem here. If applicable, add screenshots to help explain.

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