Fix CLI client crash when a file is removed before we process the change notification (#14616)

Fixes #14613

Don't crash when trying to read the modification time of a file that
might already be deleted.

Note: This fix is purely theoretical right now as I wasn't able to
reproduce the issue yet.

---------

Co-authored-by: Jordan Pittman <jordan@cryptica.me>

CHANGELOG.md

@@ -11,15 +11,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Add support for `tailwindcss/colors.js`, `tailwindcss/defaultTheme.js`, and `tailwindcss/plugin.js` exports ([#14595](https://github.com/tailwindlabs/tailwindcss/pull/14595))
 - Support `keyframes` in JS config file themes ([#14594](https://github.com/tailwindlabs/tailwindcss/pull/14594))
-- _Experimental_: The upgrade tool now automatically discovers your JavaScript config ([#14597](https://github.com/tailwindlabs/tailwindcss/pull/14597))
+- _Upgrade (experimental)_: The upgrade tool now automatically discovers your JavaScript config ([#14597](https://github.com/tailwindlabs/tailwindcss/pull/14597))
 
 ### Fixed
 
 - Don’t crash when scanning a candidate equal to the configured prefix ([#14588](https://github.com/tailwindlabs/tailwindcss/pull/14588))
 - Ensure there's always a space before `!important` when stringifying CSS ([#14611](https://github.com/tailwindlabs/tailwindcss/pull/14611))
+- Don't set `display: none` on elements that use `hidden="until-found"` ([#14631](https://github.com/tailwindlabs/tailwindcss/pull/14631))
+- Fix issue that could cause the CLI to crash when files are deleted while watching ([#14616](https://github.com/tailwindlabs/tailwindcss/pull/14616))
 - _Upgrade (experimental)_: Ensure CSS before a layer stays unlayered when running codemods ([#14596](https://github.com/tailwindlabs/tailwindcss/pull/14596))
 - _Upgrade (experimental)_: Resolve issues where some prefixed candidates were not properly migrated ([#14600](https://github.com/tailwindlabs/tailwindcss/pull/14600))
-- Don't set `display: none` on elements that use `hidden="until-found"` ([#14631](https://github.com/tailwindlabs/tailwindcss/pull/14631))
 
 ## [4.0.0-alpha.26] - 2024-10-03
 

packages/@tailwindcss-cli/src/commands/build/index.ts

@@ -3,7 +3,7 @@ import { compile, env } from '@tailwindcss/node'
 import { clearRequireCache } from '@tailwindcss/node/require-cache'
 import { Scanner, type ChangedContent } from '@tailwindcss/oxide'
 import { Features, transform } from 'lightningcss'
-import { existsSync } from 'node:fs'
+import { existsSync, type Stats } from 'node:fs'
 import fs from 'node:fs/promises'
 import path from 'node:path'
 import type { Arg, Result } from '../../utils/args'
@@ -346,8 +346,11 @@ async function createWatchers(dirs: string[], cb: (files: string[]) => void) {
           if (event.type === 'delete') return
 
           // Ignore directory changes. We only care about file changes
-          let stats = await fs.lstat(event.path)
-          if (stats.isDirectory()) {
+          let stats: Stats | null = null
+          try {
+            stats = await fs.lstat(event.path)
+          } catch {}
+          if (!stats?.isFile() && !stats?.isSymbolicLink()) {
             return
           }