Revert PR 61928

[jakebailey]

Fixes #62188

This reverts #61928

I'm not sure if it's worth the crashing it seems to be causing downstream. Some things have been fixed, but not everything.

Corsa still has this fix (it has to), so everyone will have to deal with it at some point, but...

Ref:

• Bug: [indent] Maximum call stack size exceeded typescript-eslint/typescript-eslint#11455
• Upgrade to TypeScript 5.9 breaks rules when linting TSX files eslint-stylistic/eslint-stylistic#915

[typescript-bot]

Looks like you're introducing a change to the public API surface area. If this includes breaking changes, please document them on our wiki's API Breaking Changes page.

Also, please make sure @DanielRosenwasser and @RyanCavanaugh are aware of the changes, just as a heads up.

[Copilot]

Pull Request Overview

This PR reverts changes from PR #61928 to address a crashing issue (#62188). The reversion undoes modifications to JSX token handling that were causing downstream problems, specifically changes related to how JSX closing tags and language variants are processed.

• Reverts JSX token handling changes that replaced LessThanSlashToken with separate LessThanToken and SlashToken tokens
• Removes language variant handling from scanner operations
• Updates test expectations to match the reverted token classification behavior

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/cases/fourslash/syntacticClassificationsJsx1.ts	Updates test expectations for JSX closing tag token classification
tests/cases/fourslash/syntacticClassificationsJsx2.ts	Updates test expectations for JSX closing tag token classification with namespaced elements
src/services/utilities.ts	Reverts JSX closing element token kind check from LessThanToken back to LessThanSlashToken
src/services/services.ts	Removes language variant handling from scanner operations in createChildren function
src/services/completions.ts	Reverts JSX-related token kind checks from SlashToken back to LessThanSlashToken
src/compiler/types.ts	Removes languageVariant property from SourceFileLike interface

[jakebailey]

@typescript-bot cherry-pick this to release-5.9

[typescript-bot]

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
cherry-pick this to release-5.9	✅ Started	✅ Results

[typescript-bot]

Hey, @jakebailey! I've created #62425 for you.