direction of signals in rtl viewer

[CosmoKramer]

this is from quartus rtl viewer. would like to learn how to read this diagram. 

Q is output of the flop. but why does the black arrow (circled with blue) point towards Q like it is an input to flop. 

it looks like data from mux is input into flop at Q, which is not correct. 

please help me understand this.

Thanks Y'all

[sstrell]

What does the vertical wire connected to that point go to?

[CosmoKramer]

Here is the picture showing the vertical line. It looks like it is going to a mux.  but i am not sure. 

[SyafieqS]

Hi Sandhya,

Assuming no issue with your HDL, does your rtl behave as expected if you ignore that? What Quartus type and version you are using? 

Thanks,

Regards