Meteor-RSPack Integration: A Modern Bundler Meets Meteor 3.4

wreiske · September 8, 2025, 6:52pm

=> Started proxy.
┌─────────────────────────────────────────────────
│ Rspack Dependencies Installation
└─────────────────────────────────────────────────
The following Rspack dependencies need to be installed:
  • @rspack/cli@1.5.0
  • @rspack/core@1.5.0
  • @meteorjs/rspack@0.0.43

┌─────────────────────────────────────────────────
│ ❌ Rspack Installation Failed
└─────────────────────────────────────────────────
Run: meteor npm install -D @rspack/cli@1.5.0, @rspack/core@1.5.0 and @meteorjs/rspack@0.0.43
Rspack plugin error: Failed to install Rspack dependencies. Please install them manually with: meteor npm install -D @rspack/cli@1.5.0, @rspack/core@1.5.0 and @meteorjs/rspack@0.0.43

This message should be updated… I can’t just copy and paste it since the npm install command has commas in it.

EDIT:

Also, I’ve been stuck on this for about 20 minutes…

PS C:\prj\meteor-react-tailwind-prettier-starter\apps\meteor-react-tailwind-prettier-starter> meteor npm run start                                                    
     
> start
> meteor run

[[[[[ C:\prj\meteor-react-tailwind-prettier-starter\apps\meteor-react-tailwind-prettier-starter ]]]]]

=> Started proxy.
┌─────────────────────────────────────────────────
│ Adding Gitignore Entries for Meteor Modern-Tools build context directories
└─────────────────────────────────────────────────
The following entries will be added to .gitignore:
  • _build
  • */build-assets
  • */build-chunks
  • .rsdoctor
✅ Gitignore entries for Meteor Modern-Tools build context directories added
Rspack Error: spawn meteor ENOENT
Rspack Error: spawn meteor ENOENT
=> Started MongoDB.
   Loading plugin `rspack` from package ...  \

I tried CTRL-C and re-ran the command but it’s not getting anywhere fast.

pmogollon · September 8, 2025, 7:02pm

@nachocodoner I just updated the reproduction repo for the Cannot find module '@swc/helpers/_/_async_generator_delegate'. It is caused by the openai package in the server bundle.

nachocodoner · September 8, 2025, 7:10pm

It looks like the app load process is stuck. It might be the app setup, but I’d bet it’s the environment here. It could be a Windows issue. What’s not great is that I don’t get any useful logs from Rspack Error: spawn meteor ENOENT to dig deeper.

Could you share the starter in a sample repo? I’ll try it on my Windows environment to see if I hit the same issue. I’ll provide more logs on the next stability beta if it errors.

Was it loading for you before, and now after -beta.3 it’s not? Your last message made it seem everything ran smoothly.

nachocodoner · September 8, 2025, 7:18pm

I’ve reproduced your problem. How frustrating this kind of errors that only happens in published version, not when running from checkout. I’ll likely release beta.4 soon as a stability update, along with fixes for other reports. Thank you.

Edit: @pmogollon

For the moment if your add "externalHelpers": false to your .swcrc config, it will work.

{
  "jsc": {
    "baseUrl": "./",
    "paths": {
      "@": ["./@"],
      "@hooks": ["./imports/ui/hooks"],
      "@condos": ["./imports/ui/condos"]
    },
    "externalHelpers": false
  }
}

schlaegerz · September 8, 2025, 7:56pm

I’m trying the new beta and have run into a couple problems, still working on narrowing down what causes each
Got one hard memory crash during a rebuild:


[87640:0x120008000]    60718 ms: Scavenge (interleaved) 4030.2 (4128.3) -> 4027.5 (4131.6) MB, pooled: 0 MB, 9.04 / 0.00 ms  (average mu = 0.510, current mu = 0.214) allocation failure; 
[87640:0x120008000]    60732 ms: Scavenge 4033.4 (4131.6) -> 4030.1 (4149.8) MB, pooled: 0 MB, 11.67 / 0.00 ms  (average mu = 0.510, current mu = 0.214) allocation failure; 


<--- JS stacktrace --->

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
----- Native stack trace -----

 1: 0x10454a25c node::OOMErrorHandler(char const*, v8::OOMDetails const&) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 2: 0x1047204fc v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 3: 0x10492fc24 v8::internal::Heap::stack() [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 4: 0x10492dfc4 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 5: 0x1049225ac v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 6: 0x104922de4 v8::internal::HeapAllocator::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 7: 0x104906104 v8::internal::Factory::NewFillerObject(int, v8::internal::AllocationAlignment, v8::internal::AllocationType, v8::internal::AllocationOrigin) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 8: 0x104d21bb4 v8::internal::Runtime_AllocateInYoungGeneration(int, unsigned long*, v8::internal::Isolate*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 9: 0x1051e5af4 Builtins_CEntry_Return1_ArgvOnStack_NoBuiltinExit [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
10: 0x10de25894 
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149: 0x10c821ca8 
150: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
151: 0x10c821ffc 
152: 0x10c822660 
153: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
154: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
155: 0x10518f5a4 Builtins_GeneratorPrototypeNext [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
156: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
157: 0x10518f5a4 Builtins_GeneratorPrototypeNext [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
158: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
159: 0x10518f5a4 Builtins_GeneratorPrototypeNext [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
160: 0x10b17699c 
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162: 0x10c86a534 
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165: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
166: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
167: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
168: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
169: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
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171: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
172: 0x10b153f28 
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174: 0x105150ef0 Builtins_InterpreterEntryTrampoline [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
175: 0x10c6998ac 
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179: 0x10517d594 Builtins_RunMicrotasks [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
180: 0x10514eaf4 Builtins_JSRunMicrotasksEntry [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
181: 0x104887ae0 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
182: 0x104888388 v8::internal::(anonymous namespace)::InvokeWithTryCatch(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
183: 0x1048884c0 v8::internal::Execution::TryRunMicrotasks(v8::internal::Isolate*, v8::internal::MicrotaskQueue*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
184: 0x1048b56e4 v8::internal::MicrotaskQueue::RunMicrotasks(v8::internal::Isolate*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
185: 0x1048b5e68 v8::internal::MicrotaskQueue::PerformCheckpoint(v8::Isolate*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
186: 0x1044499a8 node::InternalCallbackScope::Close() [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
187: 0x104449cc4 node::InternalMakeCallback(node::Environment*, v8::Local<v8::Object>, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context, v8::Local<v8::Value>) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
188: 0x104449fd0 node::InternalMakeCallback(v8::Isolate*, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context, v8::Local<v8::Value>) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
189: 0x1044d8838 node::Environment::CheckImmediate(uv_check_s*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
190: 0x105132d88 uv__run_check [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
191: 0x10512bda8 uv_run [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
192: 0x10444a4f4 node::SpinEventLoopInternal(node::Environment*) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
193: 0x1045950b0 node::NodeMainInstance::Run() [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.3.xr9yun3591k++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
194: 0x104505920 node::Start(int, char**) [/Users/user/.meteor/packages/meteor-tool/.3.4.0-beta.

Getting this as a server error:

Cannot find module '/Users/user/app/.meteor/local/build/programs/server/node_modules/@babel/runtime/helpers/objectWithoutProperties

And at other times this error:

Error loading app files TypeError: Cannot read properties of undefined (reading '__extends')
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/tslib/modules/index.js (webpack:/appwebsite/node_modules/tslib/modules/index.js:35:5)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@aws-sdk/core/dist-cjs/index.js (webpack:/appwebsite/node_modules/@aws-sdk/core/dist-cjs/index.js:3:17)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@aws-sdk/middleware-flexible-checksums/dist-es/flexibleChecksumsMiddleware.js (/Users/user/app/.meteor/local/build/programs/server/app/app.js:39813:80)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@aws-sdk/middleware-flexible-checksums/dist-es/index.js (/Users/user/app/.meteor/local/build/programs/server/app/app.js:40865:94)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@aws-sdk/client-s3/dist-es/S3Client.js (/Users/user/app/.meteor/local/build/programs/server/app/app.js:10402:104)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@aws-sdk/client-s3/dist-es/index.js (/Users/user/app/.meteor/local/build/programs/server/app/app.js:13093:75)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Object../node_modules/@applabs3d/app_files/index.js (webpack:/appwebsite/node_modules/@applabs3d/app_files/index.js:1:22)
W20250908-12:51:40.664(-7)? (STDERR)     at __webpack_require__ (/Users/user/app/.meteor/local/build/programs/server/app/app.js:100458:38)
W20250908-12:51:40.664(-7)? (STDERR)     at Function.__webpack_require__.t (webpack:/appwebsite/webpack/runtime/create_fake_namespace_object:10:1)
W20250908-12:51:40.664(-7)? (STDERR)     at processTicksAndRejections (node:internal/process/task_queues:105:5)

Also randomly getting the build process to just stop and get stuck after the compiling is done

edit:
THe crashing/getting stuck is pretty constant now, so I haven’t been able to deduce exactly where my other issues came from, I’ll be waiting for a future beta to test again

pmogollon · September 8, 2025, 8:03pm

Perfect. It works with that flag. Thanks.

wreiske · September 8, 2025, 8:36pm

I just published a starter template that incorporates Meteor 3.4-beta.3 (RSPack) + React 19 + Tailwind CSS 4 (Oxide) + TypeScript.

It also currently deploying to galaxy using the meteor deploy --free… it’s been “Deploying app…” for about 15 minutes now, so maybe that failed? https://todo-sample.meteorapp.com/

wreiske@Wills-MacBook-Pro-M2 meteor-react-tailwind-prettier-starter % meteor deploy todo-sample --free
Talking to Galaxy servers at https://us-east-1.galaxy-deploy.meteor.com
Preparing to build your app...                
[Rspack Build Server] [server-rspack]:e ...  /
  [server-rspack] compiled successfully in 20 ms

[Rspack Build Client] [client-rspack]:
  WARNING in ⚠ asset size limit: The following asset(s) exceed the recommended size limit (244.141 KiB). This can impact web performance.
    │ Assets:
    │   ../_build/main-prod/client-rspack.js (258.252 KiB)
  

  WARNING in ⚠ entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (244.141 KiB). This can impact web performance.
    │ Entrypoints:
    │   main (283.185 KiB)
    │       ../_build/main-prod/client-rspack.js
    │       build-chunks/main.b2a861d4b8dc4339.css
  

  WARNING in ⚠ Rspack performance recommendations:
    │ You can limit the size of your bundles by using import() to lazy load some parts of your application.
    │ For more info visit https://rspack.rs/guide/optimization/code-splitting
  

  [client-rspack] compiled with 3 warnings in 169 ms

Browserslist: caniuse-lite is outdated. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme
Preparing to upload your app...               
Uploaded app bundle for new app at todo-sample.meteorapp.com.
Galaxy is building the app into a native image.
Waiting for deployment updates from Galaxy... 
Building app image...                         
Deploying app...                                      /

EDIT: Deploy failed.

jc4hz
2025-09-08 13:31:12-07:00 at new AccountsServer (packages/accounts-base/accounts_server.js:31:5)
jc4hz
2025-09-08 13:31:12-07:00 at module.wrapAsync.self (packages/accounts-base/server_main.js:7:12)
jc4hz
2025-09-08 13:31:12-07:00 at Module.wrapAsync (/app/bundle/programs/server/npm/node_modules/meteor/modules/node_modules/@meteorjs/reify/lib/runtime/index.js:252:8)
jc4hz
2025-09-08 13:31:12-07:00 at module (/app/bundle/programs/server/packages/accounts-base.js:33:9)
jc4hz
2025-09-08 13:31:12-07:00 at fileEvaluate (packages/modules-runtime.js:335:7)
jc4hz
2025-09-08 13:31:12-07:00 at Module.require (packages/modules-runtime.js:237:14)
jc4hz
2025-09-08 13:31:12-07:00 at Module.mod.require (/app/bundle/programs/server/npm/node_modules/meteor/modules/node_modules/@meteorjs/reify/lib/runtime/index.js:30:33)
jc4hz
2025-09-08 13:31:12-07:00 at Object.require (packages/modules-runtime.js:257:21)
jc4hz
2025-09-08 13:31:12-07:00 at evaluateNextModule (packages/core-runtime.js:167:26)
jc4hz
2025-09-08 13:31:12-07:00 at runEagerModules (packages/core-runtime.js:206:3)
jc4hz
2025-09-08 13:31:12-07:00
jc4hz
2025-09-08 13:31:12-07:00Node.js v22.18.0
jc4hz
2025-09-08 13:31:12-07:00Application exited with code: 1
jc4hz
2025-09-08 13:31:30-07:00The container has crashed. A new container will be started to replace it.
7bpzy
2025-09-08 13:33:43-07:00Application process starting, version 1
7bpzy
2025-09-08 13:34:28-07:00packages/core-runtime.js:189
7bpzy
2025-09-08 13:34:28-07:00 throw error;
7bpzy
2025-09-08 13:34:28-07:00 ^
7bpzy
2025-09-08 13:34:28-07:00
7bpzy
2025-09-08 13:34:28-07:00Error: MONGO_URL must be set in environment
7bpzy
2025-09-08 13:34:28-07:00 at Object.<anonymous> (packages/mongo/remote_collection_driver.ts:113:11)
7bpzy
2025-09-08 13:34:28-07:00 at Object.defaultRemoteCollectionDriver (/app/bundle/programs/server/npm/node_modules/meteor/mongo/node_modules/lodash.once/index.js:71:21)
7bpzy
2025-09-08 13:34:28-07:00 at setupDriver (packages/mongo/collection/collection_utils.js:29:27)
7bpzy
2025-09-08 13:34:28-07:00 at new Collection (packages/mongo/collection/collection.js:52:18)
7bpzy
2025-09-08 13:34:28-07:00 at AccountsServer._initializeCollection (packages/accounts-base/accounts_common.js:114:20)
7bpzy
2025-09-08 13:34:28-07:00 at new AccountsCommon (packages/accounts-base/accounts_common.js:62:23)
7bpzy
2025-09-08 13:34:28-07:00 at new AccountsServer (packages/accounts-base/accounts_server.js:31:5)
7bpzy
2025-09-08 13:34:28-07:00 at module.wrapAsync.self (packages/accounts-base/server_main.js:7:12)
7bpzy
2025-09-08 13:34:28-07:00 at Module.wrapAsync (/app/bundle/programs/server/npm/node_modules/meteor/modules/node_modules/@meteorjs/reify/lib/runtime/index.js:252:8)
7bpzy
2025-09-08 13:34:28-07:00 at module (/app/bundle/programs/server/packages/accounts-base.js:33:9)
7bpzy
2025-09-08 13:34:28-07:00 at fileEvaluate (packages/modules-runtime.js:335:7)
7bpzy
2025-09-08 13:34:28-07:00 at Module.require (packages/modules-runtime.js:237:14)
7bpzy
2025-09-08 13:34:28-07:00 at Module.mod.require (/app/bundle/programs/server/npm/node_modules/meteor/modules/node_modules/@meteorjs/reify/lib/runtime/index.js:30:33)
7bpzy
2025-09-08 13:34:28-07:00 at Object.require (packages/modules-runtime.js:257:21)
7bpzy
2025-09-08 13:34:28-07:00 at evaluateNextModule (packages/core-runtime.js:167:26)
7bpzy
2025-09-08 13:34:28-07:00 at runEagerModules (packages/core-runtime.js:206:3)
7bpzy
2025-09-08 13:34:28-07:00
7bpzy
2025-09-08 13:34:28-07:00Node.js v22.18.0
7bpzy
2025-09-08 13:34:28-07:00Application exited with code: 1
7bpzy
2025-09-08 13:35:12-07:00The container has crashed. A new container will be started to replace it.
3f150
2025-09-08 13:38:07-07:00Application process starting, version 1
3f150
2025-09-08 13:38:29-07:00packages/core-runtime.js:189
3f150
2025-09-08 13:38:29-07:00 throw error;
3f150
2025-09-08 13:38:29-07:00 ^
3f150
2025-09-08 13:38:29-07:00
3f150
2025-09-08 13:38:29-07:00Error: MONGO_URL must be set in environment
3f150
2025-09-08 13:38:29-07:00 at Object.<anonymous> (packages/mongo/remote_collection_driver.ts:113:11)
3f150
2025-09-08 13:38:29-07:00 at Object.defaultRemoteCollectionDriver (/app/bundle/programs/server/npm/node_modules/meteor/mongo/node_modules/lodash.once/index.js:71:21)
3f150
2025-09-08 13:38:29-07:00 at setupDriver (packages/mongo/collection/collection_utils.js:29:27)
3f150
2025-09-08 13:38:29-07:00 at new Collection (packages/mongo/collection/collection.js:52:18)
3f150
2025-09-08 13:38:29-07:00 at AccountsServer._initializeCollection (packages/accounts-base/accounts_common.js:114:20)
3f150
2025-09-08 13:38:29-07:00 at new AccountsCommon (packages/accounts-base/accounts_common.js:62:23)

nachocodoner · September 9, 2025, 9:12am

@wreiske I just cloned your repository and it worked fine for me, I was able to deploy it:

https://meteor-rspack-starter.meteorapp.com

Did you try again, in case it was just a temporary connection issue?

Anyway, it’s very useful to have this starter example to confirm it works across OS. I’ll keep providing fixes for anything I find. Thanks.

Edit

3.4-beta.6. got released as the latest version.

The Meteor-Rspack fix on Windows will come later in 3.4-beta.7.

schlaegerz · September 9, 2025, 4:29pm

On that beta.6 I am still getting some memory crashes


   Building for web.browser                  \
<--- Last few GCs --->

[63469:0x148008000]   120865 ms: Mark-Compact 4033.7 (4136.5) -> 4032.4 (4134.0) MB, pooled: 7 MB, 511.17 / 0.00 ms  (average mu = 0.431, current mu = 0.039) allocation failure; scavenge might not succeed
[63469:0x148008000]   121747 ms: Mark-Compact 4048.1 (4134.0) -> 4043.5 (4160.5) MB, pooled: 4 MB, 878.42 / 0.00 ms  (average mu = 0.213, current mu = 0.004) allocation failure; scavenge might not succeed


<--- JS stacktrace --->

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
----- Native stack trace -----

 1: 0x104bd225c node::OOMErrorHandler(char const*, v8::OOMDetails const&) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 2: 0x104da84fc v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 3: 0x104fb7c24 v8::internal::Heap::stack() [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 4: 0x104fb5fc4 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 5: 0x104faa5ac v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 6: 0x104faade4 v8::internal::HeapAllocator::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 7: 0x104f8e104 v8::internal::Factory::NewFillerObject(int, v8::internal::AllocationAlignment, v8::internal::AllocationType, v8::internal::AllocationOrigin) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 8: 0x1053a9bb4 v8::internal::Runtime_AllocateInYoungGeneration(int, unsigned long*, v8::internal::Isolate*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
 9: 0x10586daf4 Builtins_CEntry_Return1_ArgvOnStack_NoBuiltinExit [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
10: 0x11097b2d8 
11: 0x2f0ada466ca4 
12: 0x2f0ada46ce70 
13: 0x1058638d4 Builtins_JSToWasmWrapperAsm [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
14: 0x10592b078 Builtins_JSToWasmWrapper [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
15: 0x10b88c1f8 
16: 0x10b88c498 
17: 0x10b88a418 
18: 0x10ba8f1e8 
19: 0x10d036678 
20: 0x105815290 Builtins_AsyncFunctionAwaitResolveClosure [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
21: 0x1058e04d8 Builtins_PromiseFulfillReactionJob [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
22: 0x105805594 Builtins_RunMicrotasks [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
23: 0x1057d6af4 Builtins_JSRunMicrotasksEntry [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
24: 0x104f0fae0 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
25: 0x104f10388 v8::internal::(anonymous namespace)::InvokeWithTryCatch(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
26: 0x104f104c0 v8::internal::Execution::TryRunMicrotasks(v8::internal::Isolate*, v8::internal::MicrotaskQueue*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
27: 0x104f3d6e4 v8::internal::MicrotaskQueue::RunMicrotasks(v8::internal::Isolate*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
28: 0x104f3de68 v8::internal::MicrotaskQueue::PerformCheckpoint(v8::Isolate*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
29: 0x104ad19a8 node::InternalCallbackScope::Close() [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
30: 0x104ad1cc4 node::InternalMakeCallback(node::Environment*, v8::Local<v8::Object>, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context, v8::Local<v8::Value>) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
31: 0x104ad1fd0 node::InternalMakeCallback(v8::Isolate*, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context, v8::Local<v8::Value>) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
32: 0x104b60838 node::Environment::CheckImmediate(uv_check_s*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
33: 0x1057bad88 uv__run_check [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
34: 0x1057b3da8 uv_run [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
35: 0x104ad24f4 node::SpinEventLoopInternal(node::Environment*) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
36: 0x104c1d0b0 node::NodeMainInstance::Run() [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
37: 0x104b8d920 node::Start(int, char**) [/Users/zacholigschlaeger/.meteor/packages/meteor-tool/.3.4.0-beta.6.1eoro3nuiay++os.osx.arm64+web.browser+web.browser.legacy+web.cordova/mt-os.osx.arm64/dev_bundle/bin/node]
38: 0x1847a6b98 start [/usr/lib/dyld]

Then I get stuck at after that happemed Loading plugin `rspack` from package ... /

It it stays stuck even after removing the _build directoy and cleaning out .meteor/local directory

I got this error, did not see a backtrace

[Rspack Server Error] Panic occurred at runtime. Please file an issue on GitHub with the backtrace below: https://github.com/web-infra-dev/rspack/issues: panicked at crates/rspack_core/src/compilation/make/graph_updater/cutout/fix_issuers.rs:59:10:
should mgm exist

Before that I was getting this error

I20250909-09:26:05.590(-7)? error on boot.js /Users/user/app/.meteor/local/build/programs/server/app/app.js:238026
I20250909-09:26:05.590(-7)? import AsyncStorage from "./AsyncStorage";
I20250909-09:26:05.590(-7)? ^^^^^^
I20250909-09:26:05.590(-7)? 
I20250909-09:26:05.590(-7)? SyntaxError: Cannot use import statement outside a module
I20250909-09:26:05.590(-7)?     at new Script (node:vm:117:7)
I20250909-09:26:05.590(-7)?     at createScript (node:vm:269:10)
I20250909-09:26:05.590(-7)?     at Object.runInThisContext (node:vm:317:10)
I20250909-09:26:05.590(-7)?     at /tools/static-assets/server/boot.js:414:32
I20250909-09:26:05.590(-7)?     at /tools/static-assets/server/boot.js:502:11
I20250909-09:26:05.590(-7)?     at Function.run (/Users/user/app/.meteor/local/build/programs/server/tools/tool-env/profile.ts:651:14)
I20250909-09:26:05.590(-7)?     at startServerProcess (/tools/static-assets/server/boot.js:501:17)
I20250909-09:26:05.590(-7)?     at Object.<anonymous> (/tools/static-assets/server/boot.js:506:2)
I20250909-09:26:05.590(-7)?     at Object.<anonymous> (/tools/static-assets/server/boot.js:510:4)
I20250909-09:26:05.590(-7)?     at Module.<anonymous> (node:internal/modules/cjs/loader:1688:14)
I20250909-09:26:05.590(-7)?     at Module.Mp._compile (/tools/static-assets/server/runtime.js:91:21)
I20250909-09:26:05.590(-7)?     at Object.Module._extensions..js (/tools/static-assets/server/runtime.js:125:21)
I20250909-09:26:05.590(-7)?     at Module.<anonymous> (node:internal/modules/cjs/loader:1423:32)
I20250909-09:26:05.590(-7)?     at Module.Mp.load (/tools/static-assets/server/runtime.js:35:31)
I20250909-09:26:05.590(-7)?     at Function._load (node:internal/modules/cjs/loader:1246:12)
I20250909-09:26:05.590(-7)?     at TracingChannel.traceSync (node:diagnostics_channel:322:14)

I don’t have that exact import in my code so I’m not positive where its coming from, and since my rs pack won’t run again I can’t quite figure out what is causing it

nachocodoner · September 9, 2025, 5:00pm

By a chance, have you updated your reproduction repository?

Is this one? Could I get it into the state where you get all these errors?

SyntaxError: Cannot use import statement outside a module

This is normally meaning that you use a nested import in your code, could be? Have you checked in verbose mode if the transpiler detects any nested import? If any, these should be transformed to a standard for rspack to work. Docs

schlaegerz · September 9, 2025, 6:16pm

I updated that repo with a different bug. This might be an architecture specific issue but including bcrypt causes this error:

W20250909-11:15:34.049(-7)? (STDERR) packages/core-runtime.js:189
W20250909-11:15:34.052(-7)? (STDERR)             throw error;
W20250909-11:15:34.052(-7)? (STDERR)             ^
W20250909-11:15:34.052(-7)? (STDERR) 
W20250909-11:15:34.052(-7)? (STDERR) Error: No native build was found for platform=darwin arch=arm64 runtime=node abi=127 uv=1 armv=8 libc=glibc node=22.18.0 webpack=true
W20250909-11:15:34.053(-7)? (STDERR)     loaded from: /_build/main-dev
W20250909-11:15:34.053(-7)? (STDERR) 
W20250909-11:15:34.053(-7)? (STDERR)     at Function.__webpack_modules__../node_modules/node-gyp-build/node-gyp-build.js.load.resolve.load.path (webpack:/meteor-app/node_modules/node-gyp-build/node-gyp-build.js:60:1)
W20250909-11:15:34.053(-7)? (STDERR)     at load (webpack:/meteor-app/node_modules/node-gyp-build/node-gyp-build.js:22:1)
W20250909-11:15:34.053(-7)? (STDERR)     at Object../node_modules/bcrypt/bcrypt.js (webpack:/meteor-app/node_modules/bcrypt/bcrypt.js:2:42)
W20250909-11:15:34.053(-7)? (STDERR)     at __webpack_require__ (/Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:42814:30)
W20250909-11:15:34.053(-7)? (STDERR)     at Object../server/main.ts (/Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:40018:59)
W20250909-11:15:34.053(-7)? (STDERR)     at __webpack_require__ (/Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:42814:30)
W20250909-11:15:34.053(-7)? (STDERR)     at /Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:42897:68
W20250909-11:15:34.053(-7)? (STDERR)     at /Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:42917:3
W20250909-11:15:34.053(-7)? (STDERR)     at module (/Users/zacholigschlaeger/otherRepos/BlankMeteorApp/simple-todos-react/.meteor/local/build/programs/server/app/app.js:42922:3)
W20250909-11:15:34.053(-7)? (STDERR)     at fileEvaluate (packages/modules-runtime.js:335:7)
W20250909-11:15:34.053(-7)? (STDERR)     at Module.require (packages/modules-runtime.js:237:14)
W20250909-11:15:34.053(-7)? (STDERR)     at Module.mod.require (/Users/zacholigschlaeger/.meteor/packages/modules/.0.20.3.bodz4ctilwg++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/@meteorjs/reify/lib/runtime/index.js:30:33)
W20250909-11:15:34.053(-7)? (STDERR)     at Module.moduleLink [as link] (/Users/zacholigschlaeger/.meteor/packages/modules/.0.20.3.bodz4ctilwg++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/@meteorjs/reify/lib/runtime/index.js:102:22)
W20250909-11:15:34.053(-7)? (STDERR)     at module.wrapAsync.self (_build/main-dev/server-meteor.js:1:1)
W20250909-11:15:34.053(-7)? (STDERR)     at Module.wrapAsync (/Users/zacholigschlaeger/.meteor/packages/modules/.0.20.3.bodz4ctilwg++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/@meteorjs/reify/lib/runtime/index.js:252:8)
W20250909-11:15:34.053(-7)? (STDERR)     at module (_build/main-dev/server-meteor.js:1:1)
W20250909-11:15:34.053(-7)? (STDERR) 
W20250909-11:15:34.053(-7)? (STDERR) Node.js v22.18.0

And I can’t figure out what is possibly causing this one to create a repro

 var __extends = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__extends), __assign = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__assign), __rest = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__rest), __decorate = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__decorate), __param = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__param), __esDecorate = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__esDecorate), __runInitializers = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__runInitializers), __propKey = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__propKey), __setFunctionName = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__setFunctionName), __metadata = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__metadata), __awaiter = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__awaiter), __generator = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__generator), __exportStar = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__exportStar), __createBinding = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__createBinding), __values = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__values), __read = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__read), __spread = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__spread), __spreadArrays = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__spreadArrays), __spreadArray = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__spreadArray), __await = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__await), __asyncGenerator = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__asyncGenerator), __asyncDelegator = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__asyncDelegator), __asyncValues = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__asyncValues), __makeTemplateObject = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__makeTemplateObject), __importStar = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__importStar), __importDefault = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__importDefault), __classPrivateFieldGet = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__classPrivateFieldGet), __classPrivateFieldSet = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__classPrivateFieldSet), __classPrivateFieldIn = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__classPrivateFieldIn), __addDisposableResource = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__addDisposableResource), __disposeResources = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__disposeResources), __rewriteRelativeImportExtension = (_tslib_js__WEBPACK_IMPORTED_MODULE_0___default().__rewriteRelativeImportExtension);
W20250909-11:18:14.959(-7)? (STDERR)                                                                  ^
W20250909-11:18:14.959(-7)? (STDERR) 
W20250909-11:18:14.959(-7)? (STDERR) TypeError: Cannot read properties of undefined (reading '__extends')
W20250909-11:18:14.959(-7)? (STDERR)     at Module../node_modules/tslib/modules/index.js (webpack:/app/node_modules/tslib/modules/index.js:35:5)

Seems like some weirdness with webpack setup

Edit: I got a repro for the second issue as well in that repo
It comes from trying to interpret .js as .jsx

rules: [
        {
          test: /\.js$/, // Target .js files
          use: {
            loader: "builtin:swc-loader",
            options: {
              jsc: {
                parser: {
                  syntax: "ecmascript",
                  jsx: true // Enable JSX parsing for JavaScript files
                }
              }
            }
          },
          type: "javascript/auto" // Specifies the module type
        }
      ]

Annoying part of that issue is I have to do a meteor reset to fix/unfix that error, and I can’t figure out how to mimic that in my large repro as I don’t want to nuke my db, and removing the cache files isn’t enough

simonwebs · September 10, 2025, 6:48am

Can you please expain it?

wreiske · September 10, 2025, 7:10am

Check out my starter template here:

Basically you setup postcss and install the required tailwindcss npm packages. You can maybe simply follow these instructions: Install Tailwind CSS with Meteor - Tailwind CSS Install Tailwind CSS with Meteor - Tailwind CSS

nachocodoner · September 10, 2025, 7:12am

You can get a Tailwind fresh project easily with:

meteor create --release 3.4-beta.6 --tailwind

That has all configured to make it work. Otherwise, you can adapt any existing project following official docs to integrateTailwind in Rspack. Consider rspack.config.js in Meteor describes differently, this file is created automatically as you install Rspack package.

nachocodoner · September 10, 2025, 12:26pm

To fix it, mark bcrypt as external in Rspack so Meteor handles it. Meteor’s bundler already includes bcrypt built-in, so adding as external make Meteor’s bcrypt to be used. With the following config, import bcrypt from "bcrypt"; console.log("bcrypt", bcrypt); resolves:

export default defineConfig(Meteor => {
  return {
    externals: [/^bcrypt/],
  };
});

I’ll add bcrypt to the default externals for the Meteor Rspack integration for next release.

Right, that happens when .js is treated as .jsx. Add a rule to support React components in .js, either in rspack.config.js (as you did) or in .swcrc. Similarly can be achieved for TypeScript and ts/tsx files.

schlaegerz · September 10, 2025, 6:46pm

Right, that happens when .js is treated as .jsx. Add a rule to support React components in .js, either in rspack.config.js (as you did) or in .swcrc. Similarly can be achieved for TypeScript and ts/tsx files.

You misunderstand. If I have that part of rspack.config.js in there it will error

In particular its this part
type: "javascript/auto" // Specifies the module type
I copied this from somewhere else so I’m not sure its even important,

schlaegerz · September 10, 2025, 7:02pm

Got through those errors, now I’m running into an error with imports not running in the expected order. I’m not sure if this is expected but will make converting a bigger task than I had hoped.

The easiest case to explain is using @shopify/shopify-api but I believe moment has a similar experienc
In order to use it you need to import an adapter like this:
import “@shopify/shopify-api/dist/cjs/adapters/node”;

Now without RS pack the bundler executes code in the order that it is imported so that we can guarantee by the time we use the shopifyApi that the adapter has been loaded

With RS pack it seems that the side effect detection isn’t quite working correctly for that module so the adapter is never applied

diavrank95 · December 28, 2025, 6:39am

Hi, I just tested the vue skeleton example for 3.4-rc.2 and I got this error:

 meteor-vue-rspack meteor            
[[[[[ ~/Documents/meteor-vue-rspack ]]]]]     

=> Started proxy.                             
=> Started HMR server.                        
[Rspack Server] [server-rspack]:package ...  /
  [server-rspack] compiled successfully in 91 ms

=> Started MongoDB.                           
[Rspack Client] <i> [webpack-dev-server] Project is running at:

[Rspack Client] <i> [webpack-dev-server] Loopback: http://localhost:8080/, http://[::1]:8080/
<i> [webpack-dev-server] On Your Network (IPv4): http://192.168.1.80:8080/
<i> [webpack-dev-server] Content not from webpack is served from '/Users/user/Documents/meteor-vue-rspack/public' directory

[Rspack Client] [client-rspack]:
  ERROR in ./imports/ui/main.css
    × Module build failed (from ./node_modules/postcss-loader/dist/cjs.js):
    ╰─▶   × /Users/user/Documents/meteor-vue-rspack/postcss.config.js:1
          │ export default {
          │ ^^^^^^
          │
          │ SyntaxError: Unexpected token 'export'
          │     at wrapSafe (node:internal/modules/cjs/loader:1281:20)
          │     at Module._compile (node:internal/modules/cjs/loader:1321:27)
          │     at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
          │     at Module.load (node:internal/modules/cjs/loader:1208:32)
          │     at Module._load (node:internal/modules/cjs/loader:1024:12)
          │     at Module.require (node:internal/modules/cjs/loader:1233:19)
          │     at module.exports (/Users/user/Documents/meteor-vue-rspack/node_modules/import-fresh/index.js:33:91)
          │     at Object.loadJsSync (/Users/user/Documents/meteor-vue-rspack/node_modules/cosmiconfig/dist/loaders.js:17:12)
          │     at .js (/Users/user/Documents/meteor-vue-rspack/node_modules/postcss-loader/dist/utils.js:57:56)
          │     at #loadConfiguration (/Users/user/Documents/meteor-vue-rspack/node_modules/cosmiconfig/dist/Explorer.js:116:42)
        
  
  [client-rspack] compiled with 1 error in 131 ms

=> Started your app.                          

=> App running at: http://localhost:3000/

To solve it, I had to switch postcss.config.js to CommonJS so postcss-loader (via cosmiconfig) can parse it; it doesn’t support ESM export default in a .js config by default. This removes the Unexpected token ‘export’ error.

Before:

export default {
  plugins: {
    "@tailwindcss/postcss": {},
  },
};

After:

module.exports = {
  plugins: {
    "@tailwindcss/postcss": {},
  },
};

So, with that, I was able to run the app correctly.

UPDATE: The above issue was because I was using Node v20.15.1. With Node 22, no changes needed to work correctly.

diavrank95 · December 31, 2025, 7:19am

@nachocodoner could you give me a hand with an issue that I am getting with rspack configuration please.

theory-swe git:(rspack-integration) ✗ yarn start
yarn run v1.22.22
$ MONGO_URL=mongodb://localhost:27017/theory-swe meteor --settings ./settings/settings-development.json
[[[[[ ~/Documents/theory-swe ]]]]]            

=> Started proxy.                             
[Rspack Client Error] Browserslist: browsers data (caniuse-lite) is 14 months old. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme

[Rspack Server Error] Browserslist: browsers data (caniuse-lite) is 14 months old. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme

[Rspack Client Error] [rspack-cli] Error: [VueLoaderPlugin Error] No matching use for vue-loader is found.
Make sure the rule matching .vue files include vue-loader in its use.
    at VueLoaderPlugin.apply (/Users/user/Documents/theory-swe/node_modules/vue-loader/dist/pluginWebpack5.js:112:19)
    at Plugin.apply (/Users/user/Documents/theory-swe/node_modules/vue-loader/dist/plugin.js:16:20)
    at createCompiler (/Users/user/Documents/theory-swe/node_modules/@rspack/core/dist/index.js:12120:179)
    at Array.map (<anonymous>)
    at /Users/user/Documents/theory-swe/node_modules/@rspack/core/dist/index.js:12137:45
    at create (/Users/user/Documents/theory-swe/node_modules/@rspack/core/dist/index.js:12140:18)
    at /Users/user/Documents/theory-swe/node_modules/@rspack/core/dist/index.js:12165:39
    at RspackCLI.createCompiler (/Users/user/Documents/theory-swe/node_modules/@rspack/cli/dist/index.js:1198:45)
    at async CAC.<anonymous> (/Users/user/Documents/theory-swe/node_modules/@rspack/cli/dist/index.js:930:34)

This is a Meteor app with Vue and Vuetify. it’s using vite and some vite aliases. But the error seems to be on the vue-loader plugin.

This is my PR chore: integrate rspack by diavrank · Pull Request #23 · diavrank/theory-swe · GitHub

Info:

Mac OS Tahoe
Node 22.21.1
Meteor 3.4-rc.2

harry73 · December 31, 2025, 7:50am

Hi @diavrank95

if it could help, here my rspack.config.js for a Vue/Vuetify project. For sure not perfect but at least, is works.

import { createRequire } from 'module';
import { dirname, resolve } from 'path';
import { fileURLToPath } from 'url';

import { defineConfig } from '@meteorjs/rspack';
import { rspack } from '@rspack/core';
import { VueLoaderPlugin } from 'vue-loader';

const require = createRequire(import.meta.url);
const swcConfig = require('./swc.config.js');

// Get the absolute path of the project directory
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const projectRoot = resolve(__dirname);

export default defineConfig(Meteor => {
  const isCoverageMode = process.env.COVERAGE === '1';

  return {
    experiments: {
      css: true,
      cache: false,
    },
    lazyCompilation: {
      entries: false,
      imports: false,
    },

    module: {
      rules: [
        // TypeScript support (both client and server)
        {
          test: /\.(ts|tsx)$/,
          loader: 'builtin:swc-loader',
          options: {
            // Merge the configuration from swc.config.js with specific options
            jsc: {
              ...swcConfig.jsc,
              // Ensure baseUrl is an absolute path (SWC requires an absolute path)
              baseUrl: projectRoot,
              parser: { syntax: 'typescript', tsx: true, decorators: true },
              target: 'es2020',
              // Ensure the coverage plugin is dynamically enabled if COVERAGE=1
              ...(isCoverageMode && {
                experimental: {
                  plugins: [
                    [
                      'swc-plugin-coverage-instrument',
                      {
                        unstableExclude: [
                          '**/node_modules/**',
                          '**/dist/**',
                          '**/build/**',
                          '**/_build/**',
                          '**/coverage/**',
                          '**/.meteor/**',
                          '**/packages/**',
                          '**/tests/**',
                        ],
                      },
                    ],
                  ],
                },
              }),
            },
          },
        },
        // Client-only loaders
        ...(Meteor.isClient
          ? [
              {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                  experimentalInlineMatchResource: true,
                },
              },
              { test: /\.scss$/, type: 'css/auto' },
              { test: /\.css$/, type: 'css' },
              {
                test: /\.(png|jpe?g|gif|svg|webp|ico)$/i,
                type: 'asset/resource',
                generator: { filename: 'assets/images/[name].[hash][ext]' },
              },
            ]
          : []),
      ],
    },
    ...(Meteor.isClient && {
      plugins: [
        new VueLoaderPlugin(),
        new rspack.DefinePlugin({
          __VUE_OPTIONS_API__: JSON.stringify(true),
          __VUE_PROD_DEVTOOLS__: JSON.stringify(false),
          __VUE_PROD_HYDRATION_MISMATCH_DETAILS__: JSON.stringify(false),
        }),
      ],
    }),

    resolve: {
      alias: {
        '@ui': '/imports/ui',
        '@api': '/imports/api',
        '@models': '/imports/types/models',
        '@localTypes': '/imports/types',
        '@plugins': '/imports/plugins',
        '@server': '/server',
        '@client': '/client',
        '@packages': '/packages',
        '@tests': '/tests',
        '@public': '/public',
        '@private': '/private',
      },
      extensions: ['.ts', '.tsx', '.js', '.jsx', '.vue', '.json'],
      extensionAlias: {
        '.js': ['.ts', '.js'],
        '.mjs': ['.mts', '.mjs'],
      },
      // Improve module resolution stability
      symlinks: true,
      fullySpecified: false,
    },
    cache: false,

    // Add stats configuration for better error reporting
    stats: {
      errorDetails: true,
      children: true,
    },
    // Split vendor chunk (client-only to avoid server build conflicts)
    ...(Meteor.isClient && !Meteor.isTest ? Meteor.splitVendorChunk() : {}),
    // Disable cache
    ...Meteor.setCache(false),
  };
});