TypeError: Cannot read properties of undefined (reading 'nodes')

[hades200082]

What version of Tailwind CSS are you using?
4.0.0

What build tool (or framework if it abstracts the build tool) are you using?
@tailwindcss/cli

What version of Node.js are you using?
Bun 1.2.x

What browser are you using?
Edge

What operating system are you using?
Windows

Reproduction URL
N/A - error is in the build process and can't be replicated on play

Describe your issue
When running bunx @tailwindcss/cli -i ./Blazor/Blazor/wwwroot/app.css -o ./Blazor/Blazor/wwwroot/app.min.css --watch it intermittently outputs TypeError: Cannot read properties of undefined (reading 'nodes')

[philipp-spiess]

Hey! I tried running bunx @tailwindcss/cli with a generic input file but the issue doesn't occur for me with bun 1.2.4. Can you please set up a reproduction in a GitHub repo so we can take a look? Thank you!

[hades200082]

I'll sort a repro when I'm back at home - travelling the next few days.

I did get it corroborated here though.

It seems to only happen when using the latest version of the CLI via npx/bunx ... if I explicitly specify version 4.0.9 in the npx/bunx command everything works correctly

[desmondinho]

Hey @philipp-spiess,

@hades200082 and I are using the same setup, and I just encountered the same issue.

@import "tailwindcss" theme(static);
@import "../bin/lumexui/theme"; <--- @theme

@source "../../LumexUI.Docs.Client/{Pages,Components}/**/*.{razor,razor.cs}"; <-- works as expected
@source "../bin/lumexui/*.cs"; <--- the problem

For some reason, only the second @source definition is causing the issue here.

Version 4.0.9 is the last working version.

Edit: I'm not sure if glob patterns actually work or if Tailwind simply scans the entire directory. I just copy-pasted this when migrating to v4 and didn't encounter any issues.

[philipp-spiess]

Heya! Friendly reminder that we still don't have a reproduction for this issue that we can run locally which means we can't really investigate the issue.

[LunarN0v4]

Managed to reproduce this issue.

❯ bun run build
$ mkdir -p ./dist/ && vite build && cp -r ./server/* ./dist/ && cp ./vite.config.ts ./dist/vite.config.ts
vite v6.2.5 building for production...
✓ 57 modules transformed.
✗ Build failed in 3.25s
error during build:
[vite:css] [postcss] Cannot read properties of undefined (reading 'nodes')
file: /home/nova/Desktop/Xivi15/client/src/index.css:undefined:NaN
    at H (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:5:717)
    at ce (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:12:1669)
    at ar (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:12:4826)
    at ar.next (<anonymous>)
    at Function.from (<anonymous>)
    at q.factory (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:15:21727)
    at q.get (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:3:6680)
    at Object.parseCandidate (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:15:22252)
    at pe (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:15:29258)
    at Object.build (/home/nova/Desktop/Xivi15/node_modules/tailwindcss/dist/lib.js:36:1627)
error: script "build" exited with code 1

Running bun v1.2.8
Link to where issue was reproduced: xiviorg/Xivi15@6174970
Exact file: https://github.com/xiviorg/Xivi15/blob/617497008bef906e7e7b32ab6aa0df7ee0278353/client/src/index.css

I've done this completely on accident, but this issue certainly exists.

[LunarN0v4]

Weird thing I've noticed, no matter how much I try to change the file, it doesn't stop this error.

[LunarN0v4]

Just giving it a file is enough for the error to show up.