From cfa7a20be541996d8f79e19f1b1e8da7e1d0c294 Mon Sep 17 00:00:00 2001
From: Michael Mayer <michael.mayer@desy.de>
Date: Tue, 9 Feb 2016 09:41:15 +0100
Subject: [PATCH] ctlike::reoptimize_lm() now works on a clone of the optimizer

---
 src/ctlike/ctlike.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/ctlike/ctlike.cpp b/src/ctlike/ctlike.cpp
index 24a7e15..6c0b71f 100644
--- a/src/ctlike/ctlike.cpp
+++ b/src/ctlike/ctlike.cpp
@@ -530,23 +530,26 @@ double ctlike::reoptimize_lm(void)
         log.indent(1);
     }
 
+    // Create a clone of the optimizer for the  re-optimisation
+    GOptimizer* opt = m_opt->clone();
+
     // Perform LM optimization
-    m_obs.optimize(*m_opt);
+    m_obs.optimize(*opt);
 
     // Optionally refit
     if (m_refit) {
-        m_obs.optimize(*m_opt);
+        m_obs.optimize(*opt);
     }
 
     // Store maximum log likelihood value
-    double logL = -(m_opt->value());
+    double logL = -(opt->value());
 
     // Write optimization results
     log.indent(0);
     if (logTerse()) {
         log << std::endl;
         log.header1("Maximum likelihood re-optimisation results");
-        log << *m_opt << std::endl;
+        log << *opt << std::endl;
     }
 
     // Return
--
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