Parts of code not executed anymore after minification

I’m using babili through the babili-webpack-plugin on an express-based project. It seems that certain parts of the code won’t be run without error once I’m using that plugin.

Steps to reproduce:

1. Checkout https://github.com/MichaelKohler/sandbox-minify-error-babili-webpack-plugin
2. npm install
3. ./node_modules/backpack-core/bin/backpack build
4. node dist/error.js
5. head to localhost:3000 and observe the terminal output

Output:

Example app listening on port 3000!
Error: hiiii im wrong!
    at /Users/mkohler/projects/error-test/dist/error.js:1:636
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/mkohler/projects/error-test/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/mkohler/projects/error-test/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)
    at /Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:281:22
    at Function.process_params (/Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:335:12)
    at next (/Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:275:10)
    at expressInit (/Users/mkohler/projects/error-test/node_modules/express/lib/middleware/init.js:40:5)
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)

However, due to the Error being thrown, I would expect the error handler to kick in and log my console.log here: https://github.com/MichaelKohler/sandbox-minify-error-babili-webpack-plugin/blob/master/index.js#L10 . This does not happen.

When I now remove the plugin definition in https://github.com/MichaelKohler/sandbox-minify-error-babili-webpack-plugin/blob/master/backpack.config.js#L13 and run the build and node commands from above again, I get the following output:

Example app listening on port 3000!
let me log myself.. I should be fine, right? Error: hiiii im wrong!
    at /Users/mkohler/projects/error-test/dist/error.js:78:8
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/mkohler/projects/error-test/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/mkohler/projects/error-test/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)
    at /Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:281:22
    at Function.process_params (/Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:335:12)
    at next (/Users/mkohler/projects/error-test/node_modules/express/lib/router/index.js:275:10)
    at expressInit (/Users/mkohler/projects/error-test/node_modules/express/lib/middleware/init.js:40:5)
    at Layer.handle [as handle_request] (/Users/mkohler/projects/error-test/node_modules/express/lib/router/layer.js:95:5)

This is exactly how I would expect it to work as I now see the console.log.

Could somebody have a look at this and tell me if I’m doing something wrong or if that really is a bug in babili?

Feel free to ask any questions you might have, I’m happy to answer them 😃

[vigneshshanmugam]

@MichaelKohler Just curios, why do you want to minify your server code?

[neophob]

will check, thanks!