Kotlin Kapt Bugs

Steps to reproduce:

1. $ git clone https://github.com/nsk-mironov/kotlin-kapt-bugs
2. $ cd kotlin-kapt-bugs
3. $ git checkout KT-25374
4. $ ./gradlew clean assembleDebug
5. Build fails because there are some incorrect usages of databinding and the error message has some really helpful information like:

Cannot find the setter for attribute 'binding:fail' with parameter type boolean on android.widget.TextView.
file:///Users/vmironov/Development/kotlin-kapt-bugs/app/src/main/res/layout/activity_main.xml Line:7

6. Open gradle.properties and change kapt.use.worker.api value to true
7. $ ./gradlew clean assembleDebug
8. Now the error message is swallowed and isn't really helpful:

> Task :app:kaptDebugKotlin FAILED
/Users/vmironov/Development/kotlin-kapt-bugs/app/build/generated/source/kapt/debug/com/github/vmironov/ic/DataBinderMapperImpl.java:9: error: cannot find symbol
import com.github.vmironov.ic.databinding.ActivityMainBindingImpl;
                                         ^
  symbol:   class ActivityMainBindingImpl
  location: package com.github.vmironov.ic.databinding
FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution
   > java.lang.reflect.InvocationTargetException (no error message)