[ ] Regression (a behavior that used to work and stopped working in a new release)
[ x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see

I get this warnings:

WARNING in ./node_modules/@angular/core/esm5/core.js
6438:15-36 Critical dependency: the request of a dependency is an expression
@ ./node_modules/@angular/core/esm5/core.js
@ dll vendor

WARNING in ./node_modules/@angular/core/esm5/core.js
6458:15-102 Critical dependency: the request of a dependency is an expression
 @ ./node_modules/@angular/core/esm5/core.js
 @ dll vendor

Current behavior
When compiling using webpack, in angular core 5.0.1 libraries there are a couple of warnings.

Expected behavior. I am work
I guess no warnings... :-)

Reproduction of the problem
Install https://github.com/vega/vega. Make call npm-upgrade and run webpack --config webpack.config.vendor.js

Please tell us about your environment:
@angular/core": "^5.0.1

Maybe it's my knowledge

regards Ingo