Radio Mast on the Moon?

A hastily taken shot from this morning through turbulent seeing, so not as sharp as it could have been.
The Internet is full of videos purporting to show artificial structures on the Moon; conspiracylunacy!
If you look at the crater Longomontanus with the prominent shadows in its interior, it appears to have a straight, thin vertical shadow such as might be cast from a mast of some kind. If you're into conspiracy theories then this would add to the body of proof, surely.
Sadly it is a clair-obscur effect of light and shade. The 'line' is in fact two shadows from the edges of central mountains in the crater which with the poor seeing have appeared to coalesce into an optical illusion; ah well..!