From 1ff36169651f78e4810e1c2f5f5a19dc6c30a00d Mon Sep 17 00:00:00 2001
From: Marius Kintel <marius@kintel.net>
Date: Sun, 8 Jan 2012 04:42:24 +0100
Subject: Drop possibly corrupt polyhedron after a minkowski error


diff --git a/src/CGALEvaluator.cc b/src/CGALEvaluator.cc
index a6b2f06..cc1c749 100644
--- a/src/CGALEvaluator.cc
+++ b/src/CGALEvaluator.cc
@@ -86,6 +86,11 @@ void CGALEvaluator::process(CGAL_Nef_polyhedron &target, const CGAL_Nef_polyhedr
 		// union && difference assert triggered by testdata/scad/bugs/rotate-diff-nonmanifold-crash.scad
 		std::string opstr = op == CGE_UNION ? "union" : op == CGE_INTERSECTION ? "intersection" : op == CGE_DIFFERENCE ? "difference" : op == CGE_MINKOWSKI ? "minkowski" : "UNKNOWN";
 		PRINTF("CGAL error in CGAL_Nef_polyhedron's %s operator: %s", opstr.c_str(), e.what());
+
+		// Minkowski errors can result in corrupt polyhedrons
+		if (op == CGE_MINKOWSKI) {
+			target = src;
+		}
 	}
 	CGAL::set_error_behaviour(old_behaviour);
 }
-- 
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