diff -r cfbabca1b4e9 -r 38e1d4383262 lemon/glpk.cc
--- a/lemon/glpk.cc	Fri Feb 03 05:55:39 2012 +0100
+++ b/lemon/glpk.cc	Sun May 06 17:18:39 2012 +0200
@@ -556,8 +556,6 @@
 
   void GlpkBase::_clear() {
     glp_erase_prob(lp);
-    rows.clear();
-    cols.clear();
   }
 
   void GlpkBase::freeEnv() {