My Angular 8 application works just fine with ng serve.
However, with ng build --prod --aot=true, I get the following error during compilation :
"export 'ɵbl' (imported as 'i1') was not found in 'my-library'
It seems like there's a bug with with the --aot flag, as it successfully compiles without it.
How can I find what is wrong with my-library ?
When building with --aot, these errors can show up when the library is not statically analyzable for AoT.
There are some gotchas that you can check in my-library to make sure it is compliant with AoT.
However this might not be the case as your error is very much opaque : try adding the --optimization=false flag to disable compression and hopefully get more details about the error :
ng build --prod --aot=true --optimization=false
Your error message could then become clearer.