Application is being configured to use Room library, meanwhile studio requested for updating build numbers of support libraries and stopped at this error.

The log also has a warning for using java 8 as room-compiler uses only Java 7 for processing. But, that has to be fine!!

App in not being built due to following issue:

```
Error:Exception in thread "main" java.lang.IllegalArgumentException
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
at com.google.devtools.build.android.desugar.DefaultMethodClassFixer$DefaultMethodFinder.visit(DefaultMethodClassFixer.java:471)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.defaultMethodsDefined(DefaultMethodClassFixer.java:319)
at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.visitEnd(DefaultMethodClassFixer.java:88)
at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
at com.google.devtools.build.android.desugar.InterfaceDesugaring.visitEnd(InterfaceDesugaring.java:85)
at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
at com.google.devtools.build.android.desugar.LambdaDesugaring.visitEnd(LambdaDesugaring.java:150)
at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at com.google.devtools.build.android.desugar.Desugar.desugarClassesInInput(Desugar.java:401)
at com.google.devtools.build.android.desugar.Desugar.desugarOneInput(Desugar.java:326)
at com.google.devtools.build.android.desugar.Desugar.desugar(Desugar.java:280)
at com.google.devtools.build.android.desugar.Desugar.main(Desugar.java:584)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesWithDesugarForStagingDebug'.
> com.android.build.api.transform.TransformException: java.lang.RuntimeException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.google.devtools.build.android.desugar.Desugar with arguments {@E:\Code\Android\Slave\VendorApp\Kwik24\app\build\intermediates\tmp\desugar_args2042478892032008870}

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 4s
Exception in thread "main" java.lang.IllegalArgumentException
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer$DefaultMethodFinder.visit(DefaultMethodClassFixer.java:471)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.defaultMethodsDefined(DefaultMethodClassFixer.java:319)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.visitEnd(DefaultMethodClassFixer.java:88)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.InterfaceDesugaring.visitEnd(InterfaceDesugaring.java:85)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.LambdaDesugaring.visitEnd(LambdaDesugaring.java:150)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.Desugar.desugarClassesInInput(Desugar.java:401)
    at com.google.devtools.build.android.desugar.Desugar.desugarOneInput(Desugar.java:326)
    at com.google.devtools.build.android.desugar.Desugar.desugar(Desugar.java:280)
    at com.google.devtools.build.android.desugar.Desugar.main(Desugar.java:584)

Exception in thread "main" java.lang.IllegalArgumentException
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer$DefaultMethodFinder.visit(DefaultMethodClassFixer.java:471)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.defaultMethodsDefined(DefaultMethodClassFixer.java:319)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.visitEnd(DefaultMethodClassFixer.java:88)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.InterfaceDesugaring.visitEnd(InterfaceDesugaring.java:85)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.LambdaDesugaring.visitEnd(LambdaDesugaring.java:150)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.Desugar.desugarClassesInInput(Desugar.java:401)
    at com.google.devtools.build.android.desugar.Desugar.desugarOneInput(Desugar.java:326)
    at com.google.devtools.build.android.desugar.Desugar.desugar(Desugar.java:280)
    at com.google.devtools.build.android.desugar.Desugar.main(Desugar.java:584)

Exception in thread "main" java.lang.IllegalArgumentException
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:108)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer$DefaultMethodFinder.visit(DefaultMethodClassFixer.java:471)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.defaultMethodsDefined(DefaultMethodClassFixer.java:319)
    at com.google.devtools.build.android.desugar.DefaultMethodClassFixer.visitEnd(DefaultMethodClassFixer.java:88)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.InterfaceDesugaring.visitEnd(InterfaceDesugaring.java:85)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at com.google.devtools.build.android.desugar.LambdaDesugaring.visitEnd(LambdaDesugaring.java:150)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassVisitor.visitEnd(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at org.objectweb.asm.ClassReader.accept(Unknown Source)
    at com.google.devtools.build.android.desugar.Desugar.desugarClassesInInput(Desugar.java:401)
    at com.google.devtools.build.android.desugar.Desugar.desugarOneInput(Desugar.java:326)
    at com.google.devtools.build.android.desugar.Desugar.desugar(Desugar.java:280)
    at com.google.devtools.build.android.desugar.Desugar.main(Desugar.java:584)
`

```

App gradle file

```
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

android {
    compileSdkVersion 26
    buildToolsVersion '26.0.2'
    defaultConfig {
        applicationId "**************"
        minSdkVersion 15
        targetSdkVersion 22
        versionCode 16
        versionName "2.3"
        multiDexEnabled true
    }

compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_8
            targetCompatibility JavaVersion.VERSION_1_8
        }

signingConfigs {
    release {

    }
    debug {
        storeFile file('../../debug.keystore')
    }
}

flavorDimensions "default"

productFlavors { ******************************* }
dexOptions {
    javaMaxHeapSize "4g"
}
buildTypes {
    release {
        signingConfig signingConfigs.release
        minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
//        debug{
//            minifyEnabled true
//            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
//        }
    }
}

repositories {
    maven { url "https://jitpack.io" }
    mavenCentral()
    maven { url 'https://maven.fabric.io/public' }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:support-annotations:26.1.0'
    compile 'com.android.support:appcompat-v7:26.1.0'
    compile 'com.android.support:design:26.1.0'
    compile 'com.android.support:recyclerview-v7:26.1.0'
    compile 'com.android.support:cardview-v7:26.1.0'
    compile 'com.android.support:support-core-utils:26.1.0'
    compile 'com.android.support:design:26.1.0'
    compile 'com.koushikdutta.async:androidasync:2.+'
    compile 'com.koushikdutta.ion:ion:2.+'
    compile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
    compile('com.crashlytics.sdk.android:crashlytics:2.6.6@aar') {
        transitive = true;
    }
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.firebaseui:firebase-ui-auth:3.2.1'
    compile 'com.google.android.gms:play-services:11.0.4'
//new libraries
compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'io.reactivex.rxjava2:rxjava:2.1.7'
//data persistence, android architecture library - Room
implementation 'android.arch.persistence.room:runtime:1.0.0'
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
implementation "android.arch.lifecycle:common-java8:1.1.0"
implementation "android.arch.persistence.room:rxjava2:1.0.0"

    }

apply plugin: 'com.google.gms.google-services'

```

Project gradle build:

```
buildscript {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.google.gms:google-services:3.1.0'
    }
}

allprojects {
    repositories {
        jcenter()
        google()
        maven {
            url "https://maven.google.com"
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

```