[Regression] Unknown tokenizer: undefined

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#321,945 opened on Jun 18, 2026 1 comment 1 reaction 1 assignee View on GitHub

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Description

ai-analyzed ai-generated bug error-telemetry

Error Message

unhandlederror-Unknown tokenizer: undefined

Stack Trace

    at gG.acquireTokenizer (../src/platform/tokenizer/node/tokenizer.ts:82:10)
    at new on (../src/extension/prompts/node/base/promptRenderer.ts:90:38)
    at (anonymous) (../src/extension/prompts/node/base/promptRenderer.ts:69:18)
    at fn (./src/vs/platform/instantiation/common/instantiationService.ts:111:10)
    at on.create (../src/extension/prompts/node/base/promptRenderer.ts:67:30)
    at FG._provideLanguageModelResponse (../src/extension/conversation/vscode-node/languageModelAccess.ts:657:56)
    at async FG.provideLanguageModelResponse (../src/extension/conversation/vscode-node/languageModelAccess.ts:853:16)

Raw Stack Trace (minified)

Error: Unknown tokenizer: undefined 	at gG.acquireTokenizer (\extensions\copilot\dist\extension.js:1682:34399) 	at new on (\extensions\copilot\dist\extension.js:1686:16373) 	at \extensions\copilot\dist\extension.js:1686:16724 	at n.invokeFunction (\extensions\copilot\dist\extension.js:29:944) 	at on.create (\extensions\copilot\dist\extension.js:1686:16687) 	at FG._provideLanguageModelResponse (\extensions\copilot\dist\extension.js:1710:11653) 	at async FG.provideLanguageModelResponse (\extensions\copilot\dist\extension.js:1710:15097)

Details

Property	Value
Bucket ID	`f969dd59-a13a-f94e-2982-6394d7b51e19`
Version	1.125.0
Commit	`93cfdd48`
Last Seen	Wed Jun 17 2026 23:58:56 GMT+0000 (Coordinated Universal Time)
Platforms	Mac, Windows, Linux
Product	VSCode

This issue was automatically created from the VS Code Errors Dashboard

Dominant language: TypeScript
Stars: 193k
Forks: 42.9k
PR merge metrics: PR metrics pending

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