[Error] [GitHub.copilot-chat] unhandlederror-e is not iterable TypeError: e is not iterable at BOe.setItems (<REDACTED: user-fil...

[vs-code-engineering]

Error Message

unhandlederror-e is not iterable  TypeError: e is not iterable 	at BOe.setItems (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19961) 	at Wd._computeFn (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19700) 	at Wd._recompute (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:11919) 	at Wd.get (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:11253) 	at Wd.reportChanges (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:497) 	at ROe.endUpdate (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19459) 	at nbn (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19177) 	at Wd.recomputeInitiallyAndOnChange (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:1092) 	at U2.init (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:2975:1659)

Stack Trace

Error: e is not iterable  TypeError: e is not iterable 	at BOe.setItems (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19961) 	at Wd._computeFn (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19700) 	at Wd._recompute (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:11919) 	at Wd.get (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:11253) 	at Wd.reportChanges (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:497) 	at ROe.endUpdate (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19459) 	at nbn (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:19177) 	at Wd.recomputeInitiallyAndOnChange (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:1163:1092) 	at U2.init (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:2975:1659) 	at Timeout._onTimeout (<REDACTED: user-file-path> Studio Code - <REDACTED: user-file-path>/Resources/app/extensions/copilot/dist/extension.js:3:12) 	at listOnTimeout (node:<REDACTED: user-file-path>:585:17) 	at process.processTimers (node:<REDACTED: user-file-path>:521:7)

Details

Property	Value
Bucket ID	afbc91e4-cd2d-84ee-2387-08b9d8be1afe
Extension Version	0.45.2026041703
Last Seen	Sun Apr 26 2026 23:27:21 GMT+0000 (Coordinated Universal Time)
Platforms	darwin
Product	Agents

---

This issue was automatically created from the VS Code Errors Dashboard

[vs-code-engineering]

Related Error Buckets

These additional error buckets are tracked by this issue (v0.45.2026041703):

Bucket	Error Message	Version
afbc91e4	e is not iterable TypeError: e is not iterable (setItems)	0.45.2026041703
f21d1da6	e is not iterable TypeError: e is not iterable (setItems) — Win32 variant	0.45.2026041703
9166bab4	e is not iterable TypeError: e is not iterable (setItems) — newer build variant	0.45.2026042001

All three buckets share the same root cause: TypeError: e is not iterable in setItems → observable recompute chain within the Copilot extension (extension.js:1163). The difference is platform path encoding (macOS vs Windows) and minor build variation.

Deminified callstack (from afbc91e4):

items (../src/util/vs/base/common/observableInternal/utils/utils.ts:276:21)
(anonymous) (../src/util/vs/base/common/observableInternal/utils/utils.ts:252:4)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/derivedImpl.ts:203:23)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/derivedImpl.ts:161:10)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/baseObservable.ts:47:7)
(anonymous) (../src/util/vs/base/common/observableInternal/utils/utils.ts:193:15)
(anonymous) (../src/util/vs/base/common/observableInternal/utils/utils.ts:166:4)
_recomputeInitiallyAndOnChange (../src/util/vs/base/common/observableInternal/observables/baseObservable.ts:113:12)
U2.init (extensions/copilot/dist/extension.js:2975:1659) [unmapped]

Trend: New bucket, first seen April 17 on extension v0.45.2026041703. Combined ~1.3K hits, ~569 users across all platforms. Single-version appearance so far.

Generated by errors-triage · ● 8.4M · ◷

[vs-code-engineering]

Stable Release Anomaly Details

Also appearing in VSCode stable release — this error was already tracked for Agents pre-release; now confirmed in the VSCode stable stream with significantly higher user counts.

• Anomaly type: new (not present in 0.45.0)
• Previous stable: 0.45.0
• Current stable: 0.45.1

Related VSCode-Product Buckets (v0.45.1)

Bucket	Users	Error Message
2d31eeba	523,103	e is not iterable TypeError: e is not iterable (setItems)
6d168f2c	28,020	e is not iterable TypeError: e is not iterable (setItems)
61892e88	14,814	e is not iterable TypeError: e is not iterable (setItems)

Combined VSCode stable users: ~565,937

Deminified callstack (from 2d31eeba):

items (../src/util/vs/base/common/observableInternal/utils/utils.ts:276:21)
(anonymous) (../src/util/vs/base/common/observableInternal/utils/utils.ts:252:4)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/derivedImpl.ts:203:23)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/derivedImpl.ts:161:10)
(anonymous) (../src/util/vs/base/common/observableInternal/observables/baseObservable.ts:47:7)
(anonymous) (../src/util/vs/base/common/observableInternal/utils/utils.ts:193:15)
init (../src/extension/git/observableGit.ts:103:18)

⚠️ This is the highest-impact new error in the 0.45.1 stable release with over 523K affected users on the VSCode product alone.

Generated by errors-stable-scan · ● 10.1M · ◷

[vs-code-engineering]

Related Error Buckets

These error buckets continue to appear in v0.47.2026042905 (previously tracked since v0.45.2026041703):

Bucket	Error Message	Version
2819c3fa	e is not iterable TypeError: e is not iterable (setItems) — Win32	0.47.2026042905
c456d90f	e is not iterable TypeError: e is not iterable (setItems) — macOS	0.47.2026042905

Combined impact: 1,142 users (678 Win32 + 464 macOS), 2,297 hits on extension v0.47.2026042905.

Trend: New buckets for v0.47 build (first seen Apr 29), continuing the same setItems → observable recompute crash pattern from v0.45. Error persists across extension updates with only minified symbol name changes (c9e.setItems vs previous BOe.setItems).

Generated by errors-triage · ● 5M · ◷

[vs-code-engineering]

🔍 Error Investigation

Summary

The error TypeError: e is not iterable occurs in the Copilot extension's observable-based Git integration. The ObservableGit.init() method creates an observable from gitApi.repositories, but when the Git extension API returns undefined instead of an array (e.g., during disposal or before full initialization), the value flows through mapObservableArrayCached into ArrayMap.setItems() which attempts for (const item of items) on a non-iterable value. This affects ~565K users on stable (v0.45.1).

Culprit Commit

No commit range was provided in the issue or comments to narrow down a culprit. The error is new in extension v0.45.2026041703 (first seen April 17, 2026). The file observableGit.ts was introduced with the initial Copilot extension integration and has had no subsequent tracked changes in the commit range. The bug is likely caused by a change in the Git extension's API behavior (returning undefined from repositories in some lifecycle states) rather than a change in this file itself.

Code Flow

sequenceDiagram
    participant GitAPI as Git Extension API
    participant ObsGit as ObservableGit.init()
    participant MapCached as mapObservableArrayCached
    participant ArrayMap as ArrayMap.setItems()

    ObsGit->>GitAPI: gitApi.repositories (getter)
    Note over GitAPI: ⚠️ Root cause:<br/>returns undefined instead of []
    GitAPI-->>ObsGit: undefined
    ObsGit->>MapCached: observableFromEvent(..., () => gitApi.repositories)
    MapCached->>ArrayMap: setItems(undefined)
    Note over ArrayMap: 💥 for (const item of items)<br/>TypeError: e is not iterable

Loading

Affected Files

File	Role
extensions/copilot/src/platform/inlineEdits/common/observableGit.ts	Root cause — passes unguarded gitApi.repositories to observable
extensions/copilot/src/util/vs/base/common/observableInternal/utils/utils.ts	Crash site — setItems() at line 276 iterates without null check

Repro Steps

1. Open VS Code with the Copilot extension enabled
2. Have a workspace with a git repository
3. Trigger a condition where the Git extension disposes or is not fully initialized when ObservableGit.init() runs (e.g., rapidly opening/closing workspaces, or the git extension failing to activate)
4. The repositories getter returns undefined instead of an empty array
5. The error fires during the observable recomputation cycle

Fix Proposal

Fix location: extensions/copilot/src/platform/inlineEdits/common/observableGit.ts → init()
Approach: Guard the repositories getter to always return an array. Change line 35 from:

const repos = observableFromEvent(this, (e) => gitApi.onDidOpenRepository(e), () => gitApi.repositories);

to:

const repos = observableFromEvent(this, (e) => gitApi.onDidOpenRepository(e), () => gitApi.repositories ?? []);

This ensures mapObservableArrayCached always receives an iterable, even if the Git API returns undefined during edge-case lifecycle states.

Recommended Owner

@kieferrm — sole author of the observableGit.ts file and copilot extension integration owner

Generated by errors-investigate · ● 2.7M · ◷