Turbopack Error: Failed to write app endpoint /page

[mastrmind-dev]

Turbopack version: de6bc159
Next.js version: 16.0.3

The panic log (next-panic-92eeb2d689d6a9d2bca36b4f8025537f.log) shows Turbopack failing in the PostCSS step, the worker connection getting forcibly closed (os error 10054), and the controller then trying to allocate a massive 15 GB buffer (16106127360 bytes), which the OS rejects and surfaces as the “memory allocation” failure. In short: Turbopack’s CSS/PostCSS pipeline crashed and led to that out-of-memory error

Error message:

memory allocation of 16106127360 bytes failed

Failed to write app endpoint /page

Caused by:
- [project]/src/app/globals.css [app-client] (css)
- failed to receive message
- reading packet length
- An existing connection was forcibly closed by the remote host. (os error 10054)

Debug info:
- Execution of get_written_endpoint_with_issues_operation failed
- Execution of endpoint_write_to_disk failed
- Execution of <AppEndpoint as Endpoint>::output failed
- Failed to write app endpoint /page
- Execution of AppEndpoint::output failed
- Execution of AppProject::app_module_graphs failed
- Execution of *<AppEndpoint as Endpoint>::additional_entries failed
- Execution of *ModuleGraph::from_graphs failed
- Execution of SingleModuleGraph::new_with_entries_visited_intern failed
- [project]/src/app/globals.css [app-client] (css)
- Execution of primary_chunkable_referenced_modules failed
- Execution of <CssModuleAsset as Module>::references failed
- Execution of parse_css failed
- Execution of <PostCssTransformedAsset as Asset>::content failed
- Execution of PostCssTransformedAsset::process failed
- Execution of evaluate_webpack_loader failed
- failed to receive message
- reading packet length
- An existing connection was forcibly closed by the remote host. (os error 10054)

[mastrmind-dev]

Replaced the experimental Tailwind v4 PostCSS integration with the stable Tailwind v3 pipeline. this worked

[Jadontalis]

How did you go about this? I am experiencing a similar issue with v4 atm