From f512892f6bc068e98478f7902c84716c3b4fbd3e Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Fri, 7 Feb 2020 15:59:33 +0100
Subject: [PATCH] Report failing union on holes instead of faulty input mesh.

---
 src/libslic3r/SLAPrintSteps.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libslic3r/SLAPrintSteps.cpp b/src/libslic3r/SLAPrintSteps.cpp
index ccbb00ae82..2d98c82c28 100644
--- a/src/libslic3r/SLAPrintSteps.cpp
+++ b/src/libslic3r/SLAPrintSteps.cpp
@@ -145,6 +145,9 @@ void SLAPrint::Steps::drill_holes(SLAPrintObject &po)
     holes_mesh.require_shared_vertices();
     if (!holes_mesh.is_manifold() || MeshBoolean::cgal::does_self_intersect(holes_mesh)) {
         MeshBoolean::self_union(holes_mesh);
+        
+        if (MeshBoolean::cgal::does_self_intersect(holes_mesh))
+            throw std::runtime_error(L("Too much overlapping holes."));
     }
     
     try {