I have a project on GitHub that I work on both in the office at home. For about 2 months it was working fine on both machines. Then two weeks ago, it stopped running on my home PC, but **still works fine on my work PC**. 

This is the error I get:

> 
> :app:shrinkDebugMultiDexComponents FAILED
> 
> 
> FAILURE: Build failed with an exception.
> 
> 
> * What went wrong:
>  Execution failed for task ':app:shrinkDebugMultiDexComponents'.
>  java.io.IOException: Can't read [D:\dev\gitRepo\app\android\app\build\intermediates\multi-dex\debug\allclasses.jar] (Can't process class [\_\_MACOSX/com/stripe/android/.\_BuildConfig.class] (Invalid magic number [51607] in class))
> * Try:
>  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
> 
> 
> 

The `stripe` package that is giving me errors is a 3rd party library [that you can find here](https://github.com/stripe/stripe-android). I list it as a dependency in my build.gradle file exactly as they say to.

```
compile 'com.stripe:stripe-android:+'

```

I have commented out all code pertaining the `stripe` and the app runs completely fine, so I do know it has something to do with how I am handling that package. 

Unfortunately I don't remember exactly what I had done to make this stop working. I do think that the week before this happened I upgraded Android Studio, and spent a considerable amount of time messing with `ProGuard` configurations. 

**What I have tried:**

* Working on the `master` branch where no `ProGuard` changes have been made.
* Uninstalling and Reinstalling Android Studio
* Re-cloning the git repo
* Installing API 17 (stripe for eclipse requires this. Not Studio but I gave it a shot).
* Contacting stripe customer support but they had no clue.
* [This stack overflow post](https://stackoverflow.com/questions/18798090/java-io-ioexception-cant-process-class-when-running-proguard-in-maven-build-of). However, there is no Mac computer that has touched the project nor have I personally zipped anything related to `stripe`.
* [From here](http://slightlyrandombrokenthoughts.blogspot.com/2010/03/reverse-engineering-java-class-magic.html), converted the magic number from Hex to ASCII. The result was **Q`** which I do not recognize.

I think it may have something to do with something I did for ProGuard, but I don't understand how. I'm on a completely different branch than any Proguard work, with a clean AndroidStudio install, with a clean repository clone, and the project still works fine when I'm in the office. 

**EDIT**

I am running this on the `debug` BuildType. These are my 3 gradle files. The first is for the entire Project, the second is for the Application Module, and the third is for a local android library Module.

**Project `build.gradle`**:
 buildscript {
 repositories {
 jcenter()
 maven { url '<http://download.crashlytics.com/maven>' }
 }
 dependencies {
 classpath 'com.android.tools.build:gradle:1.2.3'
 classpath 'com.crashlytics.tools.gradle:crashlytics-gradle:1.+'
 }
 }

```
allprojects {
    repositories {
        jcenter()
        maven{ url 'http://download.crashlytics.com/maven' }
    }
}

```

**Android Application Module `build.gradle`**

```
buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

repositories {
    maven { url 'https://maven.fabric.io/public' }
}

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.app.android"
        renderscriptTargetApi 19
        renderscriptSupportModeEnabled true
        minSdkVersion 16
        targetSdkVersion 22
        multiDexEnabled = true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
            buildConfigField 'Boolean', 'enableCrashlytics', 'true'
        }
        debug {
            buildConfigField 'Boolean', 'enableCrashlytics', 'false'
        }
        adhoc {
            debuggable true
            signingConfig signingConfigs.debug
            buildConfigField 'Boolean', 'enableCrashlytics', 'true'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/dependencies.txt'
        exclude 'META-INF/LGPL2.1'
    }
}
dependencies {
    compile project(':localLibrary')
    compile 'com.facebook.android:facebook-android-sdk:3.21.1'
    compile 'commons-io:commons-io:2.4'
    compile 'com.github.bumptech.glide:glide:3.6.1'
    compile 'com.android.support:support-v4:22.0.1'
    compile 'com.google.android.gms:play-services-identity:8.1.0'
    compile 'com.google.android.gms:play-services-plus:8.1.0'
    compile 'com.google.android.gms:play-services-maps:8.1.0'
    compile 'com.android.support:multidex:1.0.1'
    compile 'io.card:android-sdk:5.0.1'
    compile 'com.stripe:stripe-android:+'
    compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
        transitive = true;
    }
}

```

**Local Android Library Module `build.gradle`**

```
apply plugin: 'com.android.library'

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 22
        multiDexEnabled = true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:22.1.0'
    compile 'com.google.code.gson:gson:2.2.2'
    compile 'com.android.support:multidex:1.0.0'
    compile group: 'org.apache.httpcomponents' , name: 'httpmime' , version: '4.3.5'
    compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5'

}

```