Quest Marker does not appear.

[swinglinered]

I took the "Damn Vault Dweller" quest in Junktown (not the Crazed Vault Dweller from Telltale).

I looked all over between Shady Sands and Reno and could not find the place, even though the log said it was marked on my map.

I went back to the quest giver ("Fairweather", in the soutwestern part of town) and could not retake the quest.

EDIT:

I found the marker- it was way over on the right side of the World Map, 5 squares SSE of Vault 15.

So not a bug, just misleading text.