From da7965e5bc8847a50689443936cd1a41deb46963 Mon Sep 17 00:00:00 2001
From: Alexey Kudravtsev <cdr@intellij.com>
Date: Wed, 13 Sep 2017 13:01:04 +0300
Subject: [PATCH] changed wording to make clear index/size operations are bad

---
 .../util/src/com/intellij/util/containers/UnsafeWeakList.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/util/src/com/intellij/util/containers/UnsafeWeakList.java b/platform/util/src/com/intellij/util/containers/UnsafeWeakList.java
index 385274ff1b41..0fea8964ba97 100644
--- a/platform/util/src/com/intellij/util/containers/UnsafeWeakList.java
+++ b/platform/util/src/com/intellij/util/containers/UnsafeWeakList.java
@@ -303,6 +303,6 @@ public class UnsafeWeakList<T> extends AbstractList<T> {
   }
 
   private T throwNotRandomAccess() {
-    throw new IncorrectOperationException("UnsafeWeakList is not RandomAccess, use list.iterator() instead.");
+    throw new IncorrectOperationException("index/size-based operations in UnsafeWeakList are not supported because they don't make sense in the presence of weak references. Use list.iterator() (which retains elements to avoid sudden GC) instead.");
   }
 }