From 8a585910675d9365bd9fa8002acca1568bbe6921 Mon Sep 17 00:00:00 2001
From: Jonathan Moore Liles <j.liles@unix.net>
Date: Mon, 23 Mar 2015 18:01:39 -0700
Subject: [PATCH] Timeline: Don't attempt to join thread that hasn't been
 created.

Closes: #154
---
 nonlib/Thread.C | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/nonlib/Thread.C b/nonlib/Thread.C
index 6f2227b..6e5b953 100644
--- a/nonlib/Thread.C
+++ b/nonlib/Thread.C
@@ -129,7 +129,11 @@ Thread::cancel ( void )
 void
 Thread::join ( void )
 {
-    pthread_join( _thread, NULL );
+    if ( _thread != 0 )
+    {
+        /* not joined yet, go ahead. */
+        pthread_join( _thread, NULL );
+    }
     _thread = 0;
 }