hg: kulla/dev/langtools: 8080686: JShell tool: crash in jshell when variable cannot be referenced

[robert.field at oracle.com]

Changeset: 6be51e40a448
Author:    rfield
Date:      2015-05-19 15:27 -0700
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/6be51e40a448

8080686: JShell tool: crash in jshell when variable cannot be referenced

! src/jdk.jshell/share/classes/jdk/internal/jshell/impl/JShellImpl.java
! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/JShellTool.java
! src/jdk.jshell/share/classes/jdk/jshell/JShellState.java
! test/jdk/jshell/ToolBasicTest.java