kicad: LM1117 can't choose Power output line
Please update your component library



This was taken by kicad-5


  [ebuild   R    ] sci-electronics/kicad-5.0.0-r1::gentoo


What you have is an illegal part. It has two pins on top of each other and when you try to connect it is unable to resolve which one. The LM1117-3v3 is a 3pin part and it is therefore questionable what the 4th is. 
If it is a part that has a 4th pin associated with the exposed substrate for improved cooling then the symbol would clearly show the pin.