FULL PRODUCT VERSION :
java version "1.8.0_60"
java(TM) SE Rutime Environment (build 1.8.0_60-b27)
java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public static void main(String[] args) {
  ScriptEngineManager manager = new ScriptEngineManager();
        
  ScriptEngine engine1 = manager.getEngineByName("nashorn");
  engine1.eval("var sum = 0;");

  // set global variable
  manager.setBindings(engine1.getBindings(ScriptContext.ENGINE_SCOPE));
          
  ScriptEngine engine2 = manager.getEngineByName("nashorn");
  engine2.eval("sum = 150;", engine2.createBindings());
  engine2.eval("print(sum);", engine2.createBindings());
}

Expected output: 150
Actual output: 0

------------------------------------------
run with Java SE 7, output 150.


REGRESSION. Last worked in version 7u80


REPRODUCIBILITY :
This bug can be reproduced always.