t0851.scala:14: error: not enough arguments for method apply: (v1: Int,v2: String)java.lang.String in trait Function2.
Unspecified value parameter v2.
    println(f(1))
             ^
t0851.scala:22: error: not enough arguments for method apply: (v1: Int,v2: String)java.lang.String in trait Function2.
Unspecified value parameter v2.
    println(fn(1))
              ^
two errors found