Some 11th hour modifications with the dual purp...

Some 11th hour modifications with the dual purpose of a smooth console
life for sbt and so the repl can be used on google app engine. Although
this patch may look largish to be entering at RC4, there isn't a lot
going on. It's trying to make these dangerous things:

 - property and environment variable accesses
 - thread creation
 - signal handler installation

happpen in a sufficiently uniform way that people who don't want them
and places who don't allow them are not left with an unfixable situation
where things blow up inside private methods. Also, the (ahem) lower than
usual elegance levels are due to it being intended for 2.9.x as well.
Review by harrah.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/interpreter/ILoopInit.scala b/src/compiler/scala/tools/nsc/interpreter/ILoopInit.scala
index a9c092861f..6ebe3f7362 100644
--- a/src/compiler/scala/tools/nsc/interpreter/ILoopInit.scala
+++ b/src/compiler/scala/tools/nsc/interpreter/ILoopInit.scala
@@ -47,7 +47,7 @@ trait ILoopInit {
     }
     ignoring(classOf[Exception]) {
       SignalManager("INT") = {
-        if (intp == null)
+        if (intp == null || intp.lineManager == null)
           onExit()
         else if (intp.lineManager.running)
           intp.lineManager.cancel()