Error:Execution failed for task ':app:transformClassesWithInstantRunSlicerForDebug'. > java.io.IOException:
<p>whenever I try to run my app i get this error :</p>

<p><strong>Error:Execution failed for task</strong></p>

<pre><code> :app:transformClassesWithInstantRunSlicerForDebug'.
 java.io.IOException: Failed to delete 

 C:\Users\ashis\AndroidStudioProjects\FirstApp\app\build\intermediates\instant-run-support\debug\restart-changes.txt**
</code></pre>

<p><strong>and here is the output:</strong></p>

<p>Information:Gradle tasks</p>

<blockquote>
  <p>[:app:assembleDebug]
  :app:preBuild UP-TO-DATE
  :app:preDebugBuild UP-TO-DATE
  :app:checkDebugManifest
  :app:preReleaseBuild UP-TO-DATE
  :app:prepareComAndroidSupportAnimatedVectorDrawable2340Library UP-TO-DATE
  :app:prepareComAndroidSupportAppcompatV72340Library UP-TO-DATE
  :app:prepareComAndroidSupportSupportV42340Library UP-TO-DATE
  :app:prepareComAndroidSupportSupportVectorDrawable2340Library UP-TO-DATE
  :app:prepareDebugDependencies
  :app:compileDebugAidl UP-TO-DATE
  :app:compileDebugRenderscript UP-TO-DATE
  :app:generateDebugBuildConfig UP-TO-DATE
  :app:mergeDebugShaders UP-TO-DATE
  :app:compileDebugShaders UP-TO-DATE
  :app:generateDebugAssets UP-TO-DATE
  :app:mergeDebugAssets UP-TO-DATE
  :app:generateDebugResValues UP-TO-DATE
  :app:generateDebugResources UP-TO-DATE
  :app:mergeDebugResources UP-TO-DATE
  :app:processDebugManifest UP-TO-DATE
  :app:processDebugResources UP-TO-DATE
  :app:generateDebugSources UP-TO-DATE
  :app:incrementalDebugJavaCompilationSafeguard UP-TO-DATE
  :app:compileDebugJavaWithJavac UP-TO-DATE
  :app:compileDebugNdk UP-TO-DATE
  :app:compileDebugSources UP-TO-DATE
  :app:buildInfoDebugLoader
  :app:transformClassesWithExtractJarsForDebug UP-TO-DATE
  :app:transformClassesWithInstantRunVerifierForDebug UP-TO-DATE
  :app:transformClassesWithJavaResourcesVerifierForDebug UP-TO-DATE
  :app:mergeDebugJniLibFolders UP-TO-DATE
  :app:transformNative_libsWithMergeJniLibsForDebug UP-TO-DATE
  :app:processDebugJavaRes UP-TO-DATE
  :app:transformResourcesWithMergeJavaResForDebug UP-TO-DATE
  :app:transformResourcesAndNative_libsWithJavaResourcesVerifierForDebug UP-TO-DATE
  :app:transformClassesWithInstantRunForDebug UP-TO-DATE
  :app:transformClasses_enhancedWithInstant+reloadDexForDebug UP-TO-DATE
  :app:incrementalDebugTasks
  :app:prePackageMarkerForDebug
  :app:fastDeployDebugExtractor UP-TO-DATE
  :app:generateDebugInstantRunAppInfo UP-TO-DATE
  :app:coldswapKickerDebug
  :app:transformClassesWithInstantRunSlicerForDebug FAILED
  Error:Execution failed for task ':app:transformClassesWithInstantRunSlicerForDebug'.
  java.io.IOException: Failed to delete C:\Users\ashis\AndroidStudioProjects\FirstApp\app\build\intermediates\instant-run-support\debug\restart-changes.txt
  Information:BUILD FAILED
  Information:Total time: 1 mins 6.761 secs
  Information:1 error
  Information:0 warnings
  Information:See complete output in console</p>
</blockquote>