Turbopack Error: index out of bounds: the len is 80 but the index is 80

[viktorbezdek]

Turbopack version: v16.0.4
Next.js version: 16.0.5

Error message:

Turbopack Error: index out of bounds: the len is 80 but the index is 80

Happens when turbopackTreeShaking: true. Works well when disabled.

Log:

 RUST_BACKTRACE=full bun run build
$ next build
   ▲ Next.js 16.0.5 (Turbopack, Cache Components)
   - Environments: .env.local
   - Experiments (use with caution):
     ✓ optimizeCss
     · optimizePackageImports
     · serverActions
     · staticGenerationMaxConcurrency: 1
     ⨯ testProxy
     ✓ turbopackTreeShaking
     ✓ useWasmBinary

   Creating an optimized production build ...

thread 'tokio-runtime-worker' (149906792) panicked at turbopack/crates/turbopack-ecmascript/src/tree_shake/graph.rs:743:16:
index out of bounds: the len is 80 but the index is 80
stack backtrace:
   0:        0x804d43e70 - _napi_register_module_v1
   1:        0x804d558a4 - _napi_register_module_v1
   2:        0x804d18934 - _napi_register_module_v1
   3:        0x804d23048 - _napi_register_module_v1
   4:        0x804d28048 - _napi_register_module_v1
   5:        0x804d27efc - _napi_register_module_v1
   6:        0x804d287c4 - _napi_register_module_v1
   7:        0x804d28470 - _napi_register_module_v1
   8:        0x804d23154 - _napi_register_module_v1
   9:        0x804d10adc - _napi_register_module_v1
  10:        0x804e813ec - _napi_register_module_v1
  11:        0x804e81224 - _napi_register_module_v1
  12:        0x802d229bc - _BrotliDecoderVersion
  13:        0x802c54c74 - _BrotliDecoderVersion
  14:        0x800135ab8 - <unknown>
  15:        0x80013015c - <unknown>
  16:        0x800106fb8 - <unknown>
  17:        0x800102db0 - <unknown>
  18:        0x80012e714 - <unknown>
  19:        0x8001a0d68 - <unknown>
  20:        0x80000fcc4 - <unknown>
  21:        0x8000211dc - <unknown>
  22:        0x80002157c - <unknown>
  23:        0x804ce1590 - _napi_register_module_v1
  24:        0x804ce0944 - _napi_register_module_v1
  25:        0x804ccf45c - _napi_register_module_v1
  26:        0x804d04720 - _napi_register_module_v1
  27:        0x804ce1a2c - _napi_register_module_v1
  28:        0x804cd5ca8 - _napi_register_module_v1
  29:        0x804cccfc4 - _napi_register_module_v1
  30:        0x804cc334c - _napi_register_module_v1
  31:        0x804cc4128 - _napi_register_module_v1
  32:        0x804cd4820 - _napi_register_module_v1
  33:        0x804cdaadc - _napi_register_module_v1
  34:        0x804ccbee0 - _napi_register_module_v1
  35:        0x804d01cf4 - _napi_register_module_v1
  36:        0x804d2051c - _napi_register_module_v1
  37:        0x182665c0c - __pthread_cond_wait

thread 'tokio-runtime-worker' (149906797) panicked at turbopack/crates/turbopack-ecmascript/src/tree_shake/graph.rs:743:16:
index out of bounds: the len is 28 but the index is 37
stack backtrace:
   0:        0x804d43e70 - _napi_register_module_v1
   1:        0x804d558a4 - _napi_register_module_v1
   2:        0x804d18934 - _napi_register_module_v1
   3:        0x804d23048 - _napi_register_module_v1
   4:        0x804d28048 - _napi_register_module_v1
   5:        0x804d27efc - _napi_register_module_v1
   6:        0x804d287c4 - _napi_register_module_v1
   7:        0x804d28470 - _napi_register_module_v1
   8:        0x804d23154 - _napi_register_module_v1
   9:        0x804d10adc - _napi_register_module_v1
  10:        0x804e813ec - _napi_register_module_v1
  11:        0x804e81224 - _napi_register_module_v1
  12:        0x802d229bc - _BrotliDecoderVersion
  13:        0x802c54c74 - _BrotliDecoderVersion
  14:        0x800135ab8 - <unknown>
  15:        0x80013015c - <unknown>
  16:        0x800106fb8 - <unknown>
  17:        0x800102db0 - <unknown>
  18:        0x80012e714 - <unknown>
  19:        0x8001a0d68 - <unknown>
  20:        0x80000fcc4 - <unknown>
  21:        0x8000211dc - <unknown>
  22:        0x80002157c - <unknown>
  23:        0x804ce1590 - _napi_register_module_v1
  24:        0x804ce0c50 - _napi_register_module_v1
  25:        0x804ccf45c - _napi_register_module_v1
  26:        0x804d04720 - _napi_register_module_v1
  27:        0x804ce1a2c - _napi_register_module_v1
  28:        0x804cd5ca8 - _napi_register_module_v1
  29:        0x804cccfc4 - _napi_register_module_v1
  30:        0x804cc334c - _napi_register_module_v1
  31:        0x804cc4128 - _napi_register_module_v1
  32:        0x804cd4820 - _napi_register_module_v1
  33:        0x804cdaadc - _napi_register_module_v1
  34:        0x804ccbee0 - _napi_register_module_v1
  35:        0x804d01cf4 - _napi_register_module_v1
  36:        0x804d2051c - _napi_register_module_v1
  37:        0x182665c0c - __pthread_cond_wait

-----
FATAL: An unexpected Turbopack error occurred. A panic log has been written to /var/folders/2p/1z35nvgd3mvcx1xjn4_896300000gq/T/next-panic-37d590005213ed73c777300fa5e2ec19.log.

To help make Turbopack better, report this error by clicking here: https://github.com/vercel/next.js/discussions/new?category=turbopack-error-report&title=Turbopack%20Error%3A%20index%20out%20of%20bounds%3A%20the%20len%20is%2080%20but%20the%20index%20is%2080&body=Turbopack%20version%3A%20%60v16.0.4%60%0ANext.js%20version%3A%20%600.0.0%60%0A%0AError%20message%3A%0A%60%60%60%0ATurbopack%20Error%3A%20index%20out%20of%20bounds%3A%20the%20len%20is%2080%20but%20the%20index%20is%2080%0A%60%60%60&labels=Turbopack,Turbopack%20Panic%20Backtrace
-----


> Build error occurred
Error [TurbopackInternalError]: index out of bounds: the len is 80 but the index is 80

Debug info:
- Execution of get_all_written_entrypoints_with_issues_operation failed
- Execution of EntrypointsOperation::new failed
- Execution of all_entrypoints_write_to_disk_operation failed
- Execution of Project::emit_all_output_assets failed
- Execution of *emit_assets failed
- Execution of all_assets_from_entries_operation failed
- Execution of *all_assets_from_entries failed
- Execution of output_assets_operation failed
- Execution of <MiddlewareEndpoint as Endpoint>::output failed
- Execution of MiddlewareEndpoint::output_assets failed
- Execution of MiddlewareEndpoint::node_chunk failed
- Execution of *<NodeJsChunkingContext as ChunkingContext>::entry_chunk_group failed
- Execution of Project::server_chunking_context failed
- Execution of *get_server_chunking_context failed
- Execution of Project::module_ids failed
- Execution of whole_app_module_graph_operation failed
- Execution of *ModuleGraph::from_single_graph failed
- Execution of *SingleModuleGraph::new_with_entries failed
- Execution of Project::get_all_entries failed
- Execution of <AppEndpoint as Endpoint>::entries failed
- Execution of get_app_page_entry failed
- Execution of *ProcessResult::module failed
- Execution of <ModuleAssetContext as AssetContext>::process failed
- Execution of EcmascriptModulePartAsset::select_part failed
- Execution of split_module failed
- index out of bounds: the len is 80 but the index is 80
    at <unknown> (TurbopackInternalError: index out of bounds: the len is 80 but the index is 80) {
  type: 'TurbopackInternalError',
  location: 'turbopack/crates/turbopack-ecmascript/src/tree_shake/graph.rs:743:16'
}
error: script "build" exited with code 1