From 2066fee4eb54540e9408478b936227071fd0a243 Mon Sep 17 00:00:00 2001
From: Eduard Braun <eduard.braun2@gmx.de>
Date: Thu, 18 Jan 2018 22:34:57 +0100
Subject: Don't allow dragging path at cap or line join

This avoids a crash as dragging infinitesimally close to the node
will cause undefined behavior (and we were actually dragging at the
node itself in those two cases).

Fixed bug:
  - https://bugs.launchpad.net/inkscape/+bug/1691406
---
 src/ui/tool/path-manipulator.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ui/tool/path-manipulator.cpp b/src/ui/tool/path-manipulator.cpp
index f39afb8c4..e7c595893 100644
--- a/src/ui/tool/path-manipulator.cpp
+++ b/src/ui/tool/path-manipulator.cpp
@@ -1668,6 +1668,7 @@ Geom::Coord PathManipulator::_updateDragPoint(Geom::Point const &evp)
     double stroke_tolerance = _getStrokeTolerance();
     if (first && first.next() &&
         fracpart != 0.0 &&
+        fracpart != 1.0 &&
         dist < stroke_tolerance)
     {
         _dragpoint->setVisible(true);
-- 
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