FULL PRODUCT VERSION :
java version "1.8.0_31"
Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.3.9600]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Output of "jjs -version":
nashorn 1.8.0_31

A DESCRIPTION OF THE PROBLEM :
In Nashorn, the "finally" clause of a try-finally statement is sometimes executed twice (cf. steps to reproduce for an example).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
At the command line, do:
>jjs
jjs> try { for(;;) { break; } } finally { print("X"); }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
jjs> try { for(;;) { break; } } finally { print("X"); }
X
jjs>
ACTUAL -
jjs> try { for(;;) { break; } } finally { print("X"); }
X
X
jjs>

REPRODUCIBILITY :
This bug can be reproduced always.