Unable to lint incorrect class names in `@apply`

[ocavue]

What version of VS Code are you using?

Version: 1.103.2

What version of Tailwind CSS IntelliSense are you using?

Version 0.14.26

What version of Tailwind CSS are you using?

4.1.12

What package manager are you using?

pnpm

What operating system are you using?

macOS

Tailwind CSS Stylesheet (v4) or config file (v3)

@import "tailwindcss";

/* Test conflict */
.button-1 {
  @apply m-1 opacity-90 p-2 opacity-80;
}

/* Test incorrect class name */
.button-2 {
  @apply p-2 size-3;
  /* @apply m-1 unknown-class; */
}

VS Code settings

{
    "files.associations": {
        "*.css": "tailwindcss"
    },
    "editor.quickSuggestions": {
        "strings": "on"
    },
    "tailwindCSS.validate": true,
    "tailwindCSS.experimental.configFile": "src/index.css"
}

Reproduction URL

https://github.com/issueset/tailwindcss-intellisense-lint-issue

Describe your issue

According to the READMD of tailwindcss-intellisense, it should capture incorrect class name in @apply. However, as shown in the screenshot below, the extension just crashes when there is an incorrect class at line 11, and unable to detect other errors like the conflict at line 5.

[thecrypticace]

Part of this is because of Tailwind CSS itself. Need to land a change that lets us "ignore" some otherwise invalid CSS.