title: I can run assembleDebug to completion, but not assembleRelease
body: <p>I'm having a weird issue that appears to be app-specific as I can't reproduce on any of my other projects.</p>
  
  <p>What's happening is that when I go to build a release version of the app and sign it Android Studio just stalls on "Executing tasks: [:app:assembleRelease]" in the Event log. The "Gradle Build Running" indicator flashes for about 10 seconds, but then disappears. If I try to build something else (like a regular debug version), or clean the project, I get the dialog box saying "Generate Signed APK | APK(s) generated successfully" but when I go to the folder the release APK is nowhere to be found.</p>
  
  <p>I've tried cleaning, building, updating Android Studio (and all plugins, etc.) but I still have the same issue.</p>
  
  <p>I've tried creating new Keystores with new keys, but I can't get past "Executing tasks: [:app:assembleRelease]" in the Event log.</p>
  
  <p>I've also tried uninstalling and reinstalling Android Studio, but the issue persists which leads me to believe that I'm overlooking something specifically in the app itself.</p>
  
  <p>Does anyone have any ideas?</p>
  
  <p>Thanks!</p>