From c34cee90d82f8375a73963ac179131f31ef3ba45 Mon Sep 17 00:00:00 2001
From: Shinya Yoshida <shinyafox@openjdk.org>
Date: Thu, 29 Sep 2016 17:36:26 +0900
Subject: [PATCH] 8166744: JShell: java.lang.IndexOutOfBoundsException for
 legal history access

Reviewed-by: rfield, jlahoda
---
 .../classes/jdk/internal/jline/extra/EditingHistory.java      | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/extra/EditingHistory.java b/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/extra/EditingHistory.java
index 1bcccc0ded8..394d0eb4096 100644
--- a/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/extra/EditingHistory.java
+++ b/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/extra/EditingHistory.java
@@ -48,7 +48,9 @@ public abstract class EditingHistory implements History {
     private History currentDelegate;
 
     protected EditingHistory(ConsoleReader in, Iterable<? extends String> originalHistory) {
-        this.fullHistory = new MemoryHistory();
+        MemoryHistory fullHistory = new MemoryHistory();
+        fullHistory.setIgnoreDuplicates(false);
+        this.fullHistory = fullHistory;
         this.currentDelegate = fullHistory;
         bind(in, CTRL_UP,
              (Runnable) () -> moveHistoryToSnippet(in, ((EditingHistory) in.getHistory())::previousSnippet));