FULL PRODUCT VERSION :
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux juan-notebook 4.13.0-32-generic #35-Ubuntu SMP Thu Jan 25 09:13:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
When I execute the following sentence:
jshell> Stream.of("A","B","C").peek(System.out::println).count()
I get the result:
$9 ==> 3
But should be:
A
B
C
3


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open jshell and execute:
Stream.of("A","B","C").peek(System.out::println).count()

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A
B
C
3

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Don't use it with jshell.

When I execute the following class works ok:
class Snippet {
    public static void main(String[] args) {
        System.out.println(java.util.stream.Stream.of("lower", "case", "text")
            .peek(System.out::println)
            .count());
    }
}