Builds fail when using thread-loader #1206
Description
Expected Behaviour
Using thread-loader before ts-loader, compilation of a project should succeed.
Actual Behaviour
Compilation fails with the following error:
[webpack-cli] Compilation finished assets by status 655 bytes [cached] 1 asset ./src/app.ts 39 bytes [built] [code generated] [1 error] ERROR in ./src/app.ts Module build failed (from ./node_modules/thread-loader/dist/cjs.js): Thread Loader (Worker 0) Invalid value used as weak map key at PoolWorker.fromErrorObj (/Users/valeriopipolo/repos/tsloaderleak/node_modules/thread-loader/dist/WorkerPool.js:344:12) at /Users/valeriopipolo/repos/tsloaderleak/node_modules/thread-loader/dist/WorkerPool.js:217:29 at WeakMap.set (<anonymous>) at Object.getTypeScriptInstance (/Users/valeriopipolo/repos/tsloaderleak/node_modules/ts-loader/dist/instances.js:37:23) at Object.loader (/Users/valeriopipolo/repos/tsloaderleak/node_modules/ts-loader/dist/index.js:16:41) webpack 5.3.2 compiled with 1 error in 441 ms Steps to Reproduce the Problem
Use a minimal webpack configuration as follows:
module.exports = { devtool: "inline-source-map", entry: "./src/app.ts", output: { filename: "bundle.js", }, module: { rules: [ { test: /\.tsx?$/, use: ["thread-loader", "ts-loader"], }, ], }, };Running builds with webpack should fail.
Reproducible with the following dependencies:
"thread-loader": "3.0.1", "ts-loader": "8.0.8", "typescript": "4.0.5", "webpack": "4.13.0" Location of a Minimal Repository that Demonstrates the Issue.
https://github.com/valerio/tsloader-build-issue-with-thread-loader