Bug: TypeError after crawling

[chroho]

As of 2025-06-26 when executing:

kalypso-cli crawl --output-path "resources.json" --az-graph-query "type == 'microsoft.kusto/clusters' and resourceGroup contains 'dev'"

the following error occurs:

TypeError: Expected signal to be an instanceof AbortSignal at new at (.build/bundle.js:2:43331) at .build/bundle.js:2:44682 at new Promise (<anonymous>) at pt (.build/bundle.js:2:44644) at t.<anonymous> (.build/bundle.js:2:60789) at .build/bundle.js:2:30714 at Object.next (.build/bundle.js:2:30819) at .build/bundle.js:2:29755 at new Promise (<anonymous>) at ge (.build/bundle.js:2:29500)

[OnlineProxy-io]

You're getting that TypeError: Expected signal to be an instanceof AbortSignal thing - that usually means whatever’s being passed isn’t the real AbortSignal class. This can happen if you're using an older version, so first just check you’re on Node 15.4.0 or newer and if not update it.
If it’s still breaking you might be missing a proper polyfill so throw in one for AbortController if needed. Also bundlers like Webpack or Terser can mess this up during minification by renaming classes so check if that’s happening in your build. That’ll break instanceof checks instantly. And make sure stuff like node-fetch is updated - older versions sometimes bring in their own broken AbortSignal.