**BUG**
Concise problem statement:
The Autorouter does not seem to see holes from solder pads that are on one side of the board and routes tracks on the other side through them. The Copper area also does not recognise and keep clear the holes and a space around them if it is on the other face of the PCB to the pads with drill holes.
Steps to reproduce bug:
1. Make a component with solder pads with drill holes with the solder pads on one side of the board only (ie a 30 pin DIP socket), and other components that also have solder pads only on the same side of the PCB.
2. place some components (close to the DIP socket that have no other path than to cross over tracks (using a via to the other side of the PCB).
3. Autoroute. The router will usually take a path straight through the DIP socket's holes but on the other side of the PCB to the solder pads.
NB: Try this with a copper area covering a PCB on the opposite side to components with solder pads with drill holes on only one side of the PCB.
Results:
Copper areas are solid through holes (and needless to say) don't provide clearance with those holes on the reverse side.
Expected results: Routes (and copper areas) avoid and have the same clearance from the holes as specified in the autoroute/copper area clearance parameters.
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