-release 8 causes java.time.Instant to have a fictitious constructor

[smarter]

On Java 9+:

% scala -release 8
scala> new java.time.Instant
java.lang.NoSuchMethodError: java.time.Instant: method 'void <init>()' not found
  ... 34 elided

This is the same issue as scala/bug#12565 which was fixed by scala/scala#9981