From 70e27e0bf218c6d135d6fcf539ea169b9241f545 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 16 Apr 2020 21:38:33 -0600
Subject: fix Beats::operator-()

---
 libs/temporal/temporal/beats.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libs/temporal/temporal/beats.h b/libs/temporal/temporal/beats.h
index 5c8538641a..a7c8696db3 100644
--- a/libs/temporal/temporal/beats.h
+++ b/libs/temporal/temporal/beats.h
@@ -228,7 +228,14 @@ public:
 	}
 
 	Beats operator-() const {
-		return Beats(-_beats, -_ticks);
+		/* must avoid normalization here, which will convert a negative
+		   value into a valid beat position before zero, which is not
+		   we want here.
+		*/
+		Beats b (_beats, _ticks);
+		b._beats = -b._beats;
+		b._ticks = -b._ticks;
+		return b;
 	}
 
 	template<typename Number>
-- 
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