logs are full of :
2017-04-12 160046,907 [7440575] WARN - inspections.IntellijLintClient - Could not load custom rule jar file /Users/nitrog42/.android/build-cache/4db768bb83cef018804b638239677ae379c164f7/output/jars/lint.jar
java.lang.ClassCastException: timber.lint.IssueRegistry cannot be cast to com.android.tools.klint.client.api.IssueRegistry