Production build rise an error in runtime

[inoyakaigor]

Bug report

What is the current behavior?
Minification and concatenating modify code in that way which rise an error in runtime.
Minimal reproduce repo and it can be seen here https://inoyakaigor.github.io/

If the current behavior is a bug, please provide the steps to reproduce.
Open https://inoyakaigor.github.io/, open devtools, reload.

What is the expected behavior?
I expect webpack to modify the code so that it will work. I realize that when webpack builds code, it doesn't know what happens at runtime, and I'm not sure that it can be fixed in principle.

Other relevant information:
I think this issue relevant to #8902 because the error can be fixed if set to false the optimization.minimize and optimization.concatenateModules

If you after look in code start thinking about circular dependicies or something you also should to know that way to connecting store via the root store described in Mobx best practices

webpack version: 4.43.0
Node.js version: 14
Operating System: macos 10.14
Additional tools:
React: 16.13.1
Mobx: 5.15.4
Typescript: 3.8.3

[sokra]

Minimizing changes function names due to mangling. Do not rely on function names.

[inoyakaigor]

So there is no way to fix it from the webpack?

[alexander-akait]

@inoyakaigor minimize: { mangle: false } and concatenateModules: false but it is increase bundle size what is not recommended

Just do not rely on functions names

[inoyakaigor]

I found the solution and described it in my blog (in Russian)