Trying again to unbreak the repl patch.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/compiler/scala/tools/nsc/Interpreter.scala b/src/compiler/scala/tools/nsc/Interpreter.scala
index 551f7e1b40..3b6b7a1a7f 100644
--- a/src/compiler/scala/tools/nsc/Interpreter.scala
+++ b/src/compiler/scala/tools/nsc/Interpreter.scala
@@ -118,14 +118,15 @@ class Interpreter(val settings: Settings, out: PrintWriter) {
 
   // set up initialization future
   private var _isInitialized: () => Boolean = () => false
-  def initialize() {
+  def initialize() = synchronized {
     if (!_isInitialized())
       _isInitialized = scala.concurrent.ops future _initialize()
   }
 
   /** the public, go through the future compiler */
   lazy val compiler: Global = {
-    _isInitialized() // blocks until it is
+    initialize()
+    _isInitialized()   // blocks until it is
 
     _compiler
   }