This repo demonstrates a build error when using thread-loader in combination with ts-loader 8.0.8.
- install modules
yarn install - try to build
yarn build
An error should be displayed:
yarn run v1.16.0 warning package.json: No license field warning ../../package.json: No license field $ webpack [webpack-cli] Compilation finished assets by status 763 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/tsloader-build-issue-with-thread-loader/node_modules/thread-loader/dist/WorkerPool.js:344:12) at /Users/valeriopipolo/repos/tsloader-build-issue-with-thread-loader/node_modules/thread-loader/dist/WorkerPool.js:217:29 at WeakMap.set (<anonymous>) at Object.getTypeScriptInstance (/Users/valeriopipolo/repos/tsloader-build-issue-with-thread-loader/node_modules/ts-loader/dist/instances.js:37:23) at Object.loader (/Users/valeriopipolo/repos/tsloader-build-issue-with-thread-loader/node_modules/ts-loader/dist/index.js:16:41) webpack 5.3.2 compiled with 1 error in 473 ms