From 7ea4ca00dcdbd38925ed473f16b76c2e2a538eda Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Sun, 11 Feb 2018 21:06:51 -0500
Subject: [PATCH] Ensures `perform_parallel` doesn't lock up if all machines
 complete prior to reaching `condition.wait`.

---
 .../Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp b/Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp
index d7f33104d..1d24ac088 100644
--- a/Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp
+++ b/Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp
@@ -42,7 +42,7 @@ void MultiCRTMachine::perform_parallel(const std::function<void(::CRTMachine::Ma
 	}
 
 	std::unique_lock<std::mutex> lock(mutex);
-	condition.wait(lock, [&outstanding_machines] { return !outstanding_machines; });
+	if(outstanding_machines) condition.wait(lock, [&outstanding_machines] { return !outstanding_machines; });
 }
 
 void MultiCRTMachine::perform_serial(const std::function<void (::CRTMachine::Machine *)> &function) {