src/Graphics/ffglut.cpp:492: error: DEAD_STORE
  The value written to &z1 (type double) is never used.
Showing all 1 steps of the trace


src/Graphics/ffglut.cpp:492:3: Write of unused value
490.     glPolygonMode(GL_FRONT_AND_BACK,GL_LINE); 
491.     
492.     R z1= plot.z0;
         ^
493.     R z2= plot.z0;
494.