From 54520575cd11250ecf5d115b74fce5b8acd3e1aa Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 20 Jun 2017 16:01:15 -0400
Subject: Assert precondition in BuildStatus::BuildEdgeStarted

This method should be called only with edges that have not
already been started.
---
 src/build.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/build.cc b/src/build.cc
index b392803..90e910f 100644
--- a/src/build.cc
+++ b/src/build.cc
@@ -97,6 +97,7 @@ void BuildStatus::PlanHasTotalEdges(int total) {
 }
 
 void BuildStatus::BuildEdgeStarted(Edge* edge) {
+  assert(running_edges_.find(edge) == running_edges_.end());
   int start_time = (int)(GetTimeMillis() - start_time_millis_);
   running_edges_.insert(make_pair(edge, start_time));
   ++started_edges_;
-- 
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