If we set buildOptimizer and aot to false, apllication throws error?

[kumaresan-subramani]

🐞 Bug report

I have created an angular with ASP .NET Core sample. when i try to run my angular application only using below command it is working fine

ng serve --prod

But when i set buildOptimizer and aot to false application throws error

🔥 Exception or Error

My config:

🔬 Minimal Reproduction

1. Download sample

2. goto ClientApp folder

3. give npm i command

4. then give ng serve --prod

You will see reported error in console window

🌍 Your Environment

 "@angular/animations": "6.1.10",
    "@angular/common": "6.1.10",
    "@angular/compiler": "6.1.10",
    "@angular/core": "6.1.10",
    "@angular/forms": "6.1.10",
    "@angular/http": "6.1.10",
    "@angular/platform-browser": "6.1.10",
    "@angular/platform-browser-dynamic": "6.1.10",
    "@angular/platform-server": "6.1.10",
    "@angular/router": "6.1.10",

[kumaresan-subramani]

Hi @alan-agius4 ,

Do you have any idea about this, please share it

[alan-agius4]

The problem seems to be that you have optimization: true, Most likely there some non side effect code free which being removed.

[kumaresan-subramani]

okay @alan-agius4 👍

[filipesilva]

If you run ng serve --prod --source-map you can see where the error comes from:

That being said, even with that extra information the best I can see is that something breaks inside that library. Maybe it's a bug somewhere...

Can you try with the latest Angular CLI though? You are using version 6 and a lot of changed since then. Maybe the problem has been fixed.

[kumaresan-subramani]

okay @filipesilva , i will try with angular 8.

If there is a bug in my library thenm why it works fine with optimization true

[filipesilva]

Using optimization set to true will try to remove unused code. Maybe the problematic code is removed and thus it doesn't error at runtime.

[filipesilva]

Closing as stale. If you're still having this problem with the latest versions let us know with a repro and we can reopen.

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