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