  We consider inviscid flow with isentropic coefficient greater than one. For
flow along smooth infinite protruding corners we attempt to impose a nonzero
limit for velocity at infinity at the upstream wall. We prove that the problem
does not have any irrotational uniformly subsonic solutions, whereas rotational
flows do exist. This can be considered a case of a slip-condition solid
"generating" vorticity in inviscid flow.
