I am trying to add Compose to an existing project, however i get this error: ```java.lang.AssertionE...

# compose

[Mini]

I am trying to add Compose to an existing project, however i get this error:

java.lang.AssertionError: Unbound symbols not allowed

Execution failed for task ':app:compileOmbordsalgStagingDebugKotlin'.
> Internal compiler error. See log for more details

Runtime JAR files in the classpath should have the same version. These files were found in the classpath:
And then a loooooong list of
Unbound public symbol for public kotlinx.android.synthetic......

Anyone know how to fix this?

[Robert Menke]

I actually just ran into the same thing. Curious what the solution is.

[Adam Powell]

iirc this is because synthetics and the kotlinc IR backend don't agree with each other; not sure it's compose-specific but since compose requires the IR backend, the two can't be used together

[shikasd]

I think it is fixed in 1.4.20 🙂

[Robert Menke]

Hmm I didn’t have synthetics in my case. Haven’t been able to debug it yet. Good to know there’s a fix in a future version. That’s 1.4.20 of the compiler right @shikasd.

[Robert Menke]

Does the navigation component use synthetics? I have a very small project and can’t find any synthetic usage anywhere 🤔

[Ian Lake]

Navigation doesn't use synthetics, no