From 62d9f73d7846e8b9491444901baa0144b901ff0e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Fri, 17 Dec 2021 18:20:43 +0100
Subject: [PATCH] Fixed use of an uninitialized variable in TriangleSelector
 caused the cursor radius in TriangleSelector to be mistakenly reset after
 undo.

---
 src/libslic3r/TriangleSelector.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/TriangleSelector.hpp b/src/libslic3r/TriangleSelector.hpp
index 5961e76a6e..3fbb5a3d16 100644
--- a/src/libslic3r/TriangleSelector.hpp
+++ b/src/libslic3r/TriangleSelector.hpp
@@ -336,7 +336,8 @@ protected:
     int m_orig_size_indices = 0;
 
     std::unique_ptr<Cursor> m_cursor;
-    float m_old_cursor_radius_sqr;
+    // Zero indicates an uninitialized state.
+    float m_old_cursor_radius_sqr = 0;
 
     // Private functions:
 private: