Cannot read property 'constructor' of undefined

[lmk123]

After I upgrade to 3.0.4 it show me the errors:

ERROR in ./src/index.ts
Module build failed: TypeError: Cannot read property 'constructor' of undefined
    at Object.getTypeScriptInstance (./node_modules/ts-loader/dist/instances.js:26:37)
    at Object.loader (./node_modules/ts-loader/dist/index.js:24:39)

Fallback to 3.0.3 works great.

[johnnyreilly]

Please could you provide a minimal repro repo to illustrate this?

We started compiling with ts-loader 2.2.0 with this release. That's supposed to be backward compatible.

Do you have chalk as a dependency? If so, could you try pinning it to v2.2.0?

Also, what version of node are you running? I think that as a minimum you need node 4...

[lmk123]

After I pinning chalk to v2.2.0 it works!

npm i chalk@2.2.0 -D

Before that I don't install chalk by myself. It's a dependency by ts-loader and my chalk is v2.1.0 in the node_modules folder.

I'm using node 8

$ node -v
8.4.0

[johnnyreilly]

Hmmm sounds like chalk 2.2 is breaking changes.

[johnnyreilly]

Made ts-loader require 2.2 as a minimum and released as 3.0.5

Thanks for reporting!