id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	revision
430	Bug in LpBase::Constr	Alpar Juttner	Alpar Juttner	"From: Gábor Rétvári

Dear all,

Based on my understanding, the below should work:

{{{
#include <lemon/lp.h>

using namespace lemon;

int main(){
  Lp::Col v;
  Lp::Constr c = v >= -3;
  c = c <= 4;
  return 0;
}
}}}

and it should have the same effect as

{{{
c = -3 <= v <= 4
}}}

However, currently it fails with an assertion:

{{{
/export/devel/lemon/lemon/lemon/lp_base.h:1708: lemon::LpBase::Constr 
lemon::operator<=(const lemon::LpBase::Constr&, const Value&): Wrong LP 
constraint (assertion 'isNaN(tmp.upperBound())' failed)
}}}

The attached patch fixes it for me.

Best regards,
Gabor"	defect	closed	major	LEMON 1.3 release	core		fixed		Gabor Retvari <retvari@…>	4dd3dc8eb5a7