Svelte 5 Snippets Cause Language Tools ParseError

[mjadobson]

Describe the bug

When saving/formatting this file in VSCode with Svelte Extension:

App.svelte:

{#snippet Item()}
  test
{/snippet}

The Svelte extension outputs this error:

CompileError [ParseError]: Expected if, each or await
> 1 | {#snippet Item()}
    |  ^
  2 |   test
  3 | {/snippet}
  4 |
    at error (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/svelte/compiler.js:13213:20)
    at Parser$1.error (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/svelte/compiler.js:13291:10)
    at mustache (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/svelte/compiler.js:12868:21)
    at new Parser$1 (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/svelte/compiler.js:13250:22)
    at Object.parse$b [as parse] (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/svelte/compiler.js:13390:21)
    at Object.parse (/Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/prettier-plugin-svelte/plugin.js:2287:65)
    at parse4 (file:///Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/prettier/index.mjs:22117:24)
    at async coreFormat (file:///Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/prettier/index.mjs:22607:7)
    at async formatWithCursor (file:///Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/prettier/index.mjs:22809:14)
    at async Module.format2 (file:///Users/matthewdobson/.vscode/extensions/svelte.svelte-vscode-108.3.4/node_modules/prettier/index.mjs:24194:25) {
  code: 'expected-block-type',
  start: { line: 1, column: 2, character: 2 },
  end: { line: 1, column: 2, character: 2 },
  pos: 2,
  filename: undefined,
  frame: '1: {#snippet Item()}\n     ^\n2:   test\n3: {/snippet}',
  loc: {
    start: { line: 1, column: 2, character: 2 },
    end: { line: 1, column: 2, character: 2 }
  },
  codeFrame: '> 1 | {#snippet Item()}\n    |  ^\n  2 |   test\n  3 | {/snippet}\n  4 |'
}
Using Svelte v5.0.0-next.95 from /Users/matthewdobson/project
Preprocessing failed

Reproduction

See above

Expected behaviour

No ParseError

System Info

• OS: MacOS
• IDE: VSCode 1.88.1
• Svelte for VSCode: 108.3.4
• Svelte v5.0.0-next.95

Which package is the issue about?

Svelte for VS Code extension, svelte-language-server

Additional Information, eg. Screenshots

No response

[mjadobson]

Just found this is dupe of #2338 (comment)