[Bug]: rspack start generating incorrect JS in DEV mode

[albion9919]

System Info

rspack core/cli - 1.7.8
pnpm 7.33.6

Details

I've update my rspack core/cli from 1.5.8 to 1.7.8 and faced bug - rspack start generating incorrect JS in DEV mode (not for all, but for some projects in pnpm monorepo).

Generated code looks like this (i've truncated some organization info):

var __webpack_modules__ = ...
...
},
"../../../../../../.s(() => { // (вот тут затирается код)
var __webpack_modules__ = ({
"../../../../../../.schoolbook-frontend-monorepo-tmp/pnpm-virtual-store/..."(module, __webpack_exports__, __webpack_require__) {
"use strict";
eval("{__webpack_require__.r(__webpack_exports__);\n// extracted by css-extract-rspack-plugin\n\n    if(true) {\n      (function() {\n      

If you look closely, you can see webpack_modules twice.

After a couple of attempts I got the impression that the problem was in multiple writing to "filesystem", because each time code looks like overwriting 2 bundles in JS file.

Problem was faced only in JS bundles.

JS bundles on disk was correct, but when i was trying to get it from server it was incorrect.

Some WA that we found - disable https://rsbuild.rs/config/dev/write-to-disk helps.

I have researched and found breaking version interval: "1.6.0-beta.0" (valid) --> "1.6.0-beta.1" (breaked) in rspack/core.

After analyzing diff i found problem commit:

• 4dd06cf#diff-32824c984905bb02bc7ffcef96a77addd1f1602cff71a11fbbfdd7f53ee026bb

I've tried to remove this diff with manualy patching code and it works.

Patch looks like this (i patched deps by .pnpmfile.cjs, diff in package.json only for example):

diff --git a/dist/index.js b/dist/index.js
index 94846e8938af653393cfbee815402cd8d45f0682..540e63b5374b03fe3025d02e90751c193f191a3e 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -10856,7 +10856,7 @@ Help:
     class RspackOptionsApply {
         process(options, compiler) {
             if (!options.output.path) throw Error("options.output.path should have a value after `applyRspackOptionsDefaults`");
-            if (compiler.outputPath = options.output.path, compiler.name = options.name, compiler.outputFileSystem = external_node_fs_default(), options.externals) {
+            if (compiler.outputPath = options.output.path, compiler.name = options.name, compiler.outputFileSystem = require('graceful-fs'), options.externals) {
                 if (!options.externalsType) throw Error("options.externalsType should have a value after `applyRspackOptionsDefaults`");
                 new ExternalsPlugin(options.externalsType, options.externals, !1).apply(compiler);
             }
diff --git a/package.json b/package.json
index cc361f08b517a5d22d35f62fc93b26acaa797122..98bd766f7f265861b1b6b3a1eb4b7cc1a3313449 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,7 @@
     "webpack-sources": "3.3.3"
   },
   "dependencies": {
+    "graceful-fs": "4.2.11",
     "@module-federation/runtime-tools": "0.21.1",
     "@rspack/lite-tapable": "1.0.1",
     "@rspack/binding": "1.6.0-beta.1"

Reproduce link

No response

Reproduce Steps

I don't know

[chenjiahan]

Could you provide a minimal reproduction or try the Rspack 2.0 RC? (https://v2.rspack.rs/guide/migration/rspack_1.x)