From dfb90463874fdb27902d052c91e8db88cc19f0ce Mon Sep 17 00:00:00 2001
From: Sean McDirmid <sean.mcdirmid@gmail.com>
Date: Wed, 16 May 2007 10:48:36 +0000
Subject: Fixed race condition

---
 src/library/scala/Symbol.scala | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/library/scala/Symbol.scala b/src/library/scala/Symbol.scala
index dfb246a493..112764a223 100644
--- a/src/library/scala/Symbol.scala
+++ b/src/library/scala/Symbol.scala
@@ -47,8 +47,9 @@ final case class Symbol(name: String) {
    *
    *  @return the unique reference to this symbol.
    */
-  def intern: Symbol = synchronized { internedSymbols get name match {
-    case Some(sym) if sym.isValid => sym.apply
+  def intern: Symbol = synchronized {
+    internedSymbols.get(name).map(.get).getOrElse(None) match {
+    case Some(sym) => sym
     case _ =>
       internedSymbols(name) = new ref.WeakReference(this); this
   } }
-- 
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