8078660: Misleading recommendation from diamond finder.
Summary: javac should recommend diamond usage if that could lead to a change in program behavior.
Reviewed-by: mcimadamore
Neg22.java:19:16: compiler.err.cant.apply.diamond.1: (compiler.misc.diamond: Neg22.Box), (compiler.misc.diamond.invalid.arg: Neg22.Outer<java.lang.Object&java.io.Serializable&java.lang.Runnable>.Inner<java.lang.Object>, (compiler.misc.diamond: Neg22.Box))
1 error