diff --git a/src/main/scala/sbt/TrapExit.scala b/src/main/scala/sbt/TrapExit.scala
index 43a63615d..aef7cebb5 100644
--- a/src/main/scala/sbt/TrapExit.scala
+++ b/src/main/scala/sbt/TrapExit.scala
@@ -30,13 +30,7 @@ object TrapExit
 		val originalThreads = allThreads
 		val code = new ExitCode
 		val customThreadGroup = new ExitThreadGroup(new ExitHandler(Thread.getDefaultUncaughtExceptionHandler, originalThreads, code, log))
-		val executionThread =
-			new Thread(customThreadGroup, "run-main")
-			{
-				override def run(): Unit =
-					try { execute }
-					catch { case e => log.trace(e); System.exit(1) } // an exception in the main thread causes the whole program to terminate
-			}
+		val executionThread = new Thread(customThreadGroup, "run-main") { override def run() { execute } }
 		
 		val originalSecurityManager = System.getSecurityManager
 		try