1.1 --- a/lemon/lp_base.h	Mon Oct 24 21:42:22 2011 +0200
     1.2 +++ b/lemon/lp_base.h	Tue Nov 01 13:59:35 2011 +0100
     1.3 @@ -1618,7 +1618,7 @@
     1.4    ///
     1.5    inline LpBase::Constr operator<=(const LpBase::Expr &e,
     1.6                                     const LpBase::Expr &f) {
     1.7 -    return LpBase::Constr(0, f - e, LpBase::INF);
     1.8 +    return LpBase::Constr(0, f - e, LpBase::NaN);
     1.9    }
    1.10  
    1.11    ///Create constraint
    1.12 @@ -1636,7 +1636,7 @@
    1.13    ///
    1.14    inline LpBase::Constr operator<=(const LpBase::Expr &e,
    1.15                                     const LpBase::Value &f) {
    1.16 -    return LpBase::Constr(- LpBase::INF, e, f);
    1.17 +    return LpBase::Constr(LpBase::NaN, e, f);
    1.18    }
    1.19  
    1.20    ///Create constraint
    1.21 @@ -1645,7 +1645,7 @@
    1.22    ///
    1.23    inline LpBase::Constr operator>=(const LpBase::Expr &e,
    1.24                                     const LpBase::Expr &f) {
    1.25 -    return LpBase::Constr(0, e - f, LpBase::INF);
    1.26 +    return LpBase::Constr(0, e - f, LpBase::NaN);
    1.27    }
    1.28  
    1.29  
    1.30 @@ -1665,7 +1665,7 @@
    1.31    ///
    1.32    inline LpBase::Constr operator>=(const LpBase::Expr &e,
    1.33                                     const LpBase::Value &f) {
    1.34 -    return LpBase::Constr(f, e, LpBase::INF);
    1.35 +    return LpBase::Constr(f, e, LpBase::NaN);
    1.36    }
    1.37  
    1.38    ///Create constraint

     2.1 --- a/test/lp_test.cc	Mon Oct 24 21:42:22 2011 +0200
     2.2 +++ b/test/lp_test.cc	Tue Nov 01 13:59:35 2011 +0100
     2.3 @@ -166,6 +166,14 @@
     2.4      c = ((2 >= e) >= 3);
     2.5      c = ((2 >= p1) >= 3);
     2.6  
     2.7 +    { //Tests for #430
     2.8 +      LP::Col v=lp.addCol();
     2.9 +      LP::Constr c = v >= -3;
    2.10 +      c = c <= 4;
    2.11 +      LP::Constr c2;
    2.12 +      c2 = -3 <= v <= 4;
    2.13 +    }
    2.14 +
    2.15      e[x[3]]=2;
    2.16      e[x[3]]=4;
    2.17      e[x[3]]=1;