From c98621691a75b890c3d8368635be9893daa43652 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Wed, 15 Jan 2020 18:45:06 +0000
Subject: [PATCH] Don't allow degenerate arcs & circles.  Trouble will follow.

---
 pcbnew/class_drawsegment.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pcbnew/class_drawsegment.h b/pcbnew/class_drawsegment.h
index 0e3b273ba8..60e87fbe93 100644
--- a/pcbnew/class_drawsegment.h
+++ b/pcbnew/class_drawsegment.h
@@ -149,7 +149,9 @@ public:
     int GetRadius() const
     {
         double radius = GetLineLength( m_Start, m_End );
-        return KiROUND( radius );
+
+        // don't allow degenerate arcs
+        return std::max( 1, KiROUND( radius ) );
     }
 
     /**