Theia 1.68 - Error in console log: async.ts:414 Uncaught (in promise) Canceled

[safisa]

Bug Description:

Hi,
In the latest Theia 1.68, I see the following error twice after each page reload, it was not happing before this version.

async.ts:414 Uncaught (in promise) Canceled: Canceled
    at Delayer.cancel (async.ts:414:20)
    at Delayer.dispose (async.ts:425:8)
    at dispose (lifecycle.ts:303:8)
    at DisposableStore.clear (lifecycle.ts:405:4)
    at DisposableStore.dispose (lifecycle.ts:386:8)
    at WordHighlighter.dispose (wordHighlighter.ts:824:17)
    at UniqueContainer.value (wordHighlighter.ts:860:27)
    at Emitter._deliver (event.ts:1243:13)
    at Emitter._deliverQueue (event.ts:1254:9)
    at Emitter.fire (event.ts:1278:9)

It could be related to the 'Connect Monaco editors to their models' PR.

Steps to Reproduce:

1. Open the browser app
2. Open the console logs from devtools
3. You will see the error above (in my case, it was repeated twice)

Additional Information

• Operating System: Mac with Chrome
• Theia Version: 1.68.0

[pranjalisr]

Hi @ndoschek is this issue active. I’d like to take this up and work on a fix (likely by handling/ignoring expected cancellation rejections where Delayer.trigger() is used).

Please let me know if that approach sounds good.
Thanks!

[msujew]

@pranjalisr I appreciate the readyness to take a look at this, but the error is sourced within the Monaco component and we do not have direkt control over the code in question. A fix for this might be simple, but is likely rather difficult to track down in how we integrate the Monaco editor into our system. I would recommend taking up a more isolated issue as a first task :)