An internal error occurred during: "Generating completion...".

[tamasmiklossy]

Feedback source

None

GitHub Copilot plugin version

0.16.0.202604020254

Eclipse IDE and version

Version: 2026-03 (4.39.0), Build id: 20260305-0817

Platform

Microsoft Windows NT 10.0.26100.0 x64

Steps to reproduce

Just saw that error coming up while working with Eclipse:

An internal error occurred during: "Generating completion...".

java.util.ConcurrentModificationException
	at java.base/java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:1023)
	at java.base/java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:1046)
	at com.microsoft.copilot.eclipse.core.completion.CompletionProvider$CompletionJob.notifyCompletionResolved(CompletionProvider.java:289)
	at com.microsoft.copilot.eclipse.core.completion.CompletionProvider$CompletionJob.run(CompletionProvider.java:170)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

Logs (optional)

No response

Expected behavior

No error should occur

Actual behavior

Error occurs

Additional information

[tamasmiklossy]

My I ask why this issue is closed a completed without any further information?

[ethanyhou]

Hi @tamasmiklossy ,

We’ve just merged a PR with the fix so the issue was automatically closed. The fix will be included in the next release. Thank you for your patience.

[tamasmiklossy]

Ah. ok. Thank you, @ethanyhou for clarifying this.

[jdneo]

It's available in nightly: https://marketplace.eclipse.org/content/github-copilot-nightly

Remember to uninstall the stable version before installing it.

[tamasmiklossy]

Nice, thanks @jdneo for the fix!