Error:Execution failed for task ':app:kaptDebugKotlin'

Question

I'm new to using Kotlin and trying to set it up with Dagger2, I've seen some few examples but none of them seem to work for me.

I keep getting this

Error:Execution failed for task ':app:kaptDebugKotlin'.

Internal compiler error. See log for more details

I have my build.gradle (Module: app)

apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' apply plugin: 'kotlin-android-extensions'  android {     compileSdkVersion 25     buildToolsVersion "25.0.0"     defaultConfig {         applicationId "com.exampleapp"         minSdkVersion 14         targetSdkVersion 25         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     }     kapt {         generateStubs = true     }     dexOptions {         javaMaxHeapSize "2048M"     } }  ext {     supportLibVer = '25.0.0'     daggerVer = '2.8' }  dependencies {     compile fileTree(dir: 'libs', include: ['*.jar'])      // Support lib     compile "com.android.support:appcompat-v7:${supportLibVer}"      kapt "com.google.dagger:dagger-compiler:${daggerVer}"     compile "com.google.dagger:dagger:${daggerVer}"     provided "javax.annotation:jsr250-api:${javaxVer}"      compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"   } repositories {     mavenCentral() } 

Answer 1

Run your application with ./gradlew clean build command to see what's exactly wrong with your code. Just paste it into the Terminal in Android Studio.

Answer 2

If you are using the Room database and getting a KAPT error, just check your

1. Database declarations
2. Data Access Object declarations
3. Data class fields

It's a problem arising due to improper usage of annotations of Room. For more information use your build logs.