IssueTracker

Problem: Cannot build project using ./gradlew or Android Studio

- see: https://stackoverflow.com/questions/45604099/rxjavaplugins-error-didnt-find-class-com-google-devtools-build-android-desugar
- 3.0-beta1 with Gradle-Wrapper 4.1-all.zip
- added some resources, like Kotlin, Timber, RxKotlin
- databinding enabled
- Proguard enabled for all build-targets


Error:

```
Warning: android.databinding.CallbackRegistry: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: android.databinding.CallbackRegistry: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: io.reactivex.exceptions.CompositeException: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: io.reactivex.exceptions.CompositeException: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: io.reactivex.plugins.RxJavaPlugins: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: io.reactivex.plugins.RxJavaPlugins: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.AutoCloseableKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.AutoCloseableKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.ExceptionsKt__ExceptionsKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.ExceptionsKt__ExceptionsKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.ExceptionsKt__ExceptionsKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.ExceptionsKt__ExceptionsKt: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.internal.JRE7PlatformImplementations: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: kotlin.internal.JRE7PlatformImplementations: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: retrofit2.OkHttpCall$1: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: retrofit2.OkHttpCall$1: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: timber.log.Timber$Tree: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
Warning: timber.log.Timber$Tree: can't find referenced class com.google.devtools.build.android.desugar.runtime.ThrowableExtension
```



build.gradle:

```
...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    dataBinding {
        enabled = true
    }

     buildTypes.all { type ->
         // enable proguard for all targets
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }


dependencies {
 
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
.....
...

    kapt "com.android.databinding:compiler:3.0-beta1"

}
```


proguard-rules.pro:

```
# Dagger dependency injection
# https://github.com/google/dagger/issues/645
-dontwarn com.google.errorprone.annotations.*

# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote retrofit2.Platform
# Platform used when running on Java 8 VMs. Will not be used at runtime.
-dontwarn retrofit2.Platform$Java8
# Retain generic type information for use by reflection by converters and adapters.
-keepattributes Signature
# Retain declared checked exceptions for use by a Proxy instance.
-keepattributes Exceptions

# Http and JSON parsing
# https://github.com/square/okio/issues/60
-dontwarn okhttp3.**
-dontwarn okio.**
-dontwarn javax.annotation.Nullable
-dontwarn javax.annotation.ParametersAreNonnullByDefault

# Protobuf
# https://github.com/krschultz/android-proguard-snippets/issues/116
# Api23+ uses OpenJDK instead of JDK
-dontwarn sun.misc.Unsafe
-keep class com.google.protobuf.** { *; }
```


Build: 3.0 Beta 1, AI-171.4243858, 201708032321,

AI-171.4243858, JRE 1.8.0_152-release-915-b01x64 JetBrains s.r.o, OS Mac OS X(x86_64) v10.12.6 unknown, screens 1920x1200, 3440x1440

IMPORTANT: Please read https://developer.android.com/studio/report-bugs.html carefully and supply all required information.