[Error] unhandlederror-TreeError [CommentsTree] Tree element not found: [object Object]

[vs-code-engineering]

Error Message

unhandlederror-TreeError [CommentsTree] Tree element not found: [object Object]

Stack Trace

    at n2.getNode (./src/vs/base/browser/ui/tree/objectTreeModel.ts:277:9)
    at (anonymous) (./src/vs/base/browser/ui/tree/abstractTree.ts:3036:0)
    at (anonymous) (./src/vs/base/browser/ui/tree/abstractTree.ts:3036:0)
    at fn (./src/vs/base/common/event.ts:1838:12)
    at iLe.setFocus (./src/vs/base/browser/ui/tree/abstractTree.ts:3035:0)
    at bLe.refresh (./src/vs/workbench/contrib/comments/browser/commentsView.ts:518:0)
    at Qye.value (./src/vs/workbench/contrib/comments/browser/commentsView.ts:276:0)
    at T._deliver (./src/vs/base/common/event.ts:1364:12)
    at T._deliverQueue (./src/vs/base/common/event.ts:1375:8)
    at T.fire (./src/vs/base/common/event.ts:1399:8)
    at bLe.setVisible (./src/vs/workbench/browser/parts/views/viewPane.ts:424:0)
    at (anonymous) (./src/vs/workbench/browser/parts/views/viewPaneContainer.ts:677:0)
    at Qc.setVisible (./src/vs/workbench/browser/parts/views/viewPaneContainer.ts:677:0)
    at n.setVisible (./src/vs/workbench/browser/panecomposite.ts:53:26)
    at XG.showComposite (./src/vs/workbench/browser/parts/compositePart.ts:290:0)
    at XG.showComposite (./src/vs/workbench/browser/parts/paneCompositePart.ts:220:0)
    at XG.doOpenComposite (./src/vs/workbench/browser/parts/compositePart.ts:165:0)
    at XG.openComposite (./src/vs/workbench/browser/parts/compositePart.ts:129:0)
    at XG.doOpenPaneComposite (./src/vs/workbench/browser/parts/paneCompositePart.ts:527:0)
    at XG.openPaneComposite (./src/vs/workbench/browser/parts/paneCompositePart.ts:495:0)

Raw Stack Trace (minified)

Error: TreeError [CommentsTree] Tree element not found: [object Object]     at n2.getNode (out/vs/workbench/workbench.desktop.main.js:861:9613)     at out/vs/workbench/workbench.desktop.main.js:861:1574     at Array.map (<anonymous>)     at out/vs/workbench/workbench.desktop.main.js:861:1556     at JO.bufferEvents (out/vs/workbench/workbench.desktop.main.js:405:7119)     at iLe.setFocus (out/vs/workbench/workbench.desktop.main.js:861:1530)     at bLe.refresh (out/vs/workbench/workbench.desktop.main.js:1059:2426)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:1055:17238)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at bLe.setVisible (out/vs/workbench/workbench.desktop.main.js:1047:3710)     at out/vs/workbench/workbench.desktop.main.js:1069:17316     at Array.map (<anonymous>)     at Qc.setVisible (out/vs/workbench/workbench.desktop.main.js:1069:17307)     at n.setVisible (out/vs/workbench/workbench.desktop.main.js:1192:8357)     at XG.showComposite (out/vs/workbench/workbench.desktop.main.js:1316:138057)     at XG.showComposite (out/vs/workbench/workbench.desktop.main.js:1323:10735)     at XG.doOpenComposite (out/vs/workbench/workbench.desktop.main.js:1316:136132)     at XG.openComposite (out/vs/workbench/workbench.desktop.main.js:1316:135705)     at XG.doOpenPaneComposite (out/vs/workbench/workbench.desktop.main.js:1323:17078)     at XG.openPaneComposite (out/vs/workbench/workbench.desktop.main.js:1323:16645)     at cit.openPaneComposite (out/vs/workbench/workbench.desktop.main.js:1738:6735)     at mot.openComposite (out/vs/workbench/workbench.desktop.main.js:1872:127301)     at mot.openView (out/vs/workbench/workbench.desktop.main.js:1872:129715)     at Qx.openCommentsView (out/vs/workbench/workbench.desktop.main.js:1055:1271)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:1054:122884)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T._deliverQueue (out/vs/workbench/workbench.desktop.main.js:405:3358)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3693)     at tLe.updateModelThreads (out/vs/workbench/workbench.desktop.main.js:1046:22472)     at tLe.updateComments (out/vs/workbench/workbench.desktop.main.js:1046:23716)     at KZe.updateCommentThread (out/vs/workbench/workbench.desktop.main.js:1069:32882)     at r0t.$updateCommentThread (out/vs/workbench/workbench.desktop.main.js:1069:37289)     at a._doInvokeHandler (out/vs/workbench/workbench.desktop.main.js:4996:51747)     at a._invokeHandler (out/vs/workbench/workbench.desktop.main.js:4996:51493)     at a._receiveRequest (out/vs/workbench/workbench.desktop.main.js:4996:50274)     at a._receiveOneMessage (out/vs/workbench/workbench.desktop.main.js:4996:49108)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4996:47180)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3588)     at o8.fire (out/vs/workbench/workbench.desktop.main.js:1034:9636)     at COt._receiveMessage (out/vs/workbench/workbench.desktop.main.js:1034:14552)     at Qye.value (out/vs/workbench/workbench.desktop.main.js:1034:11850)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3588)     at iZe.acceptChunk (out/vs/workbench/workbench.desktop.main.js:1034:6498)     at out/vs/workbench/workbench.desktop.main.js:1034:5630     at Qye.value (out/vs/workbench/workbench.desktop.main.js:4955:124683)     at T._deliver (out/vs/workbench/workbench.desktop.main.js:405:3269)     at T.fire (out/vs/workbench/workbench.desktop.main.js:405:3588)     at _fileReader.onload (out/vs/workbench/workbench.desktop.main.js:4955:122886)

Details

Property	Value
Bucket ID	2047484b-8c6c-840b-c0a2-53385eeca2c8
Version	1.121.0
Commit	f6cfa2ea
Last Seen	Wed May 20 2026 23:59:20 GMT+0000 (Coordinated Universal Time)
Platforms	Mac, Windows, Linux
Product	VSCode

---

This issue was automatically created from the VS Code Errors Dashboard

[vs-code-engineering]

Stable Release Anomaly Details

Property	Value
Anomaly type	new
Previous stable	1.120.0
Current stable	1.121.0
Users (current stable)	351 (+ 286 in related bucket ae7258c9)
Platforms	Mac, Windows, Linux

Deminified Stack Summary

The error occurs in the Comments tree view when attempting to set focus on elements that no longer exist in the tree model, triggered during comment thread updates from extension host.

Related Buckets

• ae7258c9 (286 users) — same error, slightly different trigger path (onCommentsUpdated vs setVisible)

Generated by errors-stable-scan · ● 8.3M · ◷