Obtained from:
https://git.archlinux.org/svntogit/packages.git/tree/trunk/qtiplot-gsl2.patch?h=packages/qtiplot

Description: adoptation to gsl2.
Author: Damir Islamov <damir@secretlaboratory.ru>
Last-Update: 2015-12-04

--- qtiplot/src/analysis/Fit.cpp
+++ qtiplot/src/analysis/Fit.cpp
@@ -126,10 +126,12 @@ gsl_multifit_fdfsolver * Fit::fitGSL(gsl
 			break;
 		}
 	}
-
+	gsl_matrix *J = gsl_matrix_alloc(d_n, d_p);
 	if (status){
-	    gsl_multifit_covar (s->J, 0.0, covar);
+	    gsl_multifit_fdfsolver_jac(s, J);
+	    gsl_multifit_covar (J, 0.0, covar);
 	    iterations = 0;
+	    gsl_matrix_free (J);
 	    return s;
 	}

@@ -154,9 +156,9 @@ gsl_multifit_fdfsolver * Fit::fitGSL(gsl

 		status = gsl_multifit_test_delta (s->dx, s->x, d_tolerance, d_tolerance);
 	} while (inRange && status == GSL_CONTINUE && (int)iter < d_max_iterations);
-
-	gsl_multifit_covar (s->J, 0.0, covar);
-
+	gsl_multifit_fdfsolver_jac(s, J);
+	gsl_multifit_covar (J, 0.0, covar);
+	gsl_matrix_free (J);
 	iterations = iter;
 	return s;
 }