From be5b26c33adc9e541476a51dded0b45ed4819852 Mon Sep 17 00:00:00 2001
From: Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
Date: Fri, 20 Apr 2018 14:35:43 +0900
Subject: _pipeline.py: Declare tracking related members in the constructor

---
 buildstream/_pipeline.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/buildstream/_pipeline.py b/buildstream/_pipeline.py
index 80e7d076c..682329e6c 100644
--- a/buildstream/_pipeline.py
+++ b/buildstream/_pipeline.py
@@ -111,6 +111,8 @@ class Pipeline():
         self._artifacts = None
         self._loader = None
         self._exceptions = None
+        self._track_cross_junctions = False
+        self._track_elements = []
 
         #
         # Early initialization
@@ -187,7 +189,6 @@ class Pipeline():
 
         # Work out what we're going track, if anything
         self._track_cross_junctions = track_cross_junctions
-        self._track_elements = []
         if track_elements:
             self._track_elements = self._get_elements_to_track(track_elements, track_selection)
 
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