From 402fe908c16d5cdf9fbf2356b98e1ce95a6cf262 Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Tue, 25 Oct 2022 10:03:35 +0200
Subject: [PATCH] Measuring - Gizmo measure - Fixed crash when selecting two
 parallel planes

---
 src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
index b89b6785d0..172992db93 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
@@ -1208,6 +1208,9 @@ void GLGizmoMeasure::render_dimensioning()
 
     auto arc_plane_plane = [this, arc_edge_edge](const Measure::SurfaceFeature& f1, const Measure::SurfaceFeature& f2) {
         assert(f1.get_type() == Measure::SurfaceFeatureType::Plane && f2.get_type() == Measure::SurfaceFeatureType::Plane);
+        if (!m_measurement_result.angle.has_value())
+            return;
+
         const std::pair<Vec3d, Vec3d> e1 = m_measurement_result.angle->e1;
         const std::pair<Vec3d, Vec3d> e2 = m_measurement_result.angle->e2;
         const double calc_radius = m_measurement_result.angle->radius;