Missing variable reassignment in generated cpp code

Expected: different values assigned to the variable c two times.

Actual: c gets value assigned only first time.

Model:

component Add{
    ports
        in Q(0 : 10) a,
        out Q(0 : 20) c;

    implementation Math{
        Q b = 42 + a;
        c = 1 + b;

        b = 43;
        c = 1 + b;
    }
}

Generated code:

#ifndef ADD
#define ADD
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#include "armadillo"
using namespace arma;
class add{
public:
double a;
double c;
void init()
{
}
void execute()
{
double b = 2+a;
c = 1+b;
b = 3;
}
};
#endif

Missing c = 1 + b; as the last statement in the execute() block.

Problem occurs only when c has two identical assignments.