TypeError: Cannot read property 'replace' of undefined at Object.exports.removeComments

> NODE_ENV=production bankai build

14:56:54 ✨  Compiling & compressing files

14:56:54 ✨  created: dist
14:56:54 ✨  created: dist/manifest.json
14:56:54 ✨  created: dist/manifest.json.gz
14:56:54 ✨  created: dist/manifest.json.deflate
14:56:54 ✨  created: dist/manifest.json.br
events.js:183
      throw er; // Unhandled 'error' event
      ^

TypeError: Cannot read property 'replace' of undefined
    at Object.exports.removeComments (/Users/sril/src/stef/node_modules/combine-source-map/index.js:151:12)
    at DestroyableTransform.write [as _transform] (/Users/sril/src/stef/node_modules/browser-pack/index.js:74:30)
    at DestroyableTransform.Transform._read (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_transform.js:182:10)
    at DestroyableTransform.Transform._write (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_transform.js:170:83)
    at doWrite (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_writable.js:406:64)
    at writeOrBuffer (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_writable.js:395:5)
    at DestroyableTransform.Writable.write (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_writable.js:322:11)
    at DestroyableTransform.ondata (/Users/sril/src/stef/node_modules/readable-stream/lib/_stream_readable.js:612:20)
    at emitOne (events.js:116:13)
    at DestroyableTransform.emit (events.js:211:7)

Relevant links:

• combine-source-map/index.js:153
• browser-pacek/index.js:75

Deps:

"devDependencies": {
  "bankai": "^9.5.1"
},
"dependencies": {
  "bel": "^5.1.6",
  "choo": "^6.7.0",
  "choo-devtools": "^2.3.3",
  "choo-log": "^8.0.0",
  "normalize.css": "^8.0.0",
  "sheetify": "^7.2.0"
}

[stefee]

I just tried deleting package-lock.json and node_modules and running npm i and bankai build seems to be working now, but now bankai start is having issues! 🙈 I’ll try to work out what on earth is going on now. Thanks for the help!

[goto-bus-stop]

thanks, yeah, seeing this too with your repro! this is because of an old bug in browser-pack-flat that was fixed in https://github.com/goto-bus-stop/browser-pack-flat/commit/ee119540133e6d1f12b999a6bbcb50daa37e303a (released as 3.0.1), but the package-lock.json in your repo still has it pinned to 3.0.0. running npm update should fix it locally, could you check if that helps?

it’s a bit unfortunate that npm@5 doesn’t update existing deps on npm install anymore; makes this sort of thing easier to run into…