From 056030b1d2c54e0d024c437c98200cf763edbf88 Mon Sep 17 00:00:00 2001
From: Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>
Date: Fri, 27 Nov 2020 14:31:00 +0100
Subject: [PATCH] Sketcher: Solver Interface - Treat length equality parameter
 as a driven parameter to enable redundant constraint reporting

---
 src/Mod/Sketcher/App/Sketch.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Sketcher/App/Sketch.cpp b/src/Mod/Sketcher/App/Sketch.cpp
index f36f1e4d25a3..76bc5f57c4cc 100644
--- a/src/Mod/Sketcher/App/Sketch.cpp
+++ b/src/Mod/Sketcher/App/Sketch.cpp
@@ -2256,7 +2256,9 @@ int Sketch::addEqualConstraint(int geoId1, int geoId2)
         double dy2 = (*l2.p2.y - *l2.p1.y);
         double value = (sqrt(dx1*dx1+dy1*dy1)+sqrt(dx2*dx2+dy2*dy2))/2;
         // add the parameter for the common length (this is added to Parameters, not FixParameters)
-        Parameters.push_back(new double(value));
+        double *drivenvalue = new double(value);
+        Parameters.push_back(drivenvalue);
+        DrivenParameters.push_back(drivenvalue);
         double *length = Parameters[Parameters.size()-1];
         int tag = ++ConstraintsCounter;
         GCSsys.addConstraintEqualLength(l1, l2, length, tag);