Jacoco was modified to filter out changes from the not null assertion operator in 0.8.3
When looking at the report generated by the jacoco gradle plugin, it shows 100% coverage even though the '!!' is never throwing an exception.
With the plugin, the report shows missing coverage there, but when you drive to the source code it shows the lines in green.
My guess is that this is caused by the plugin using jacoco 0.8.2.