HttpResponseMessage resp = await httpClient.PostAsync(<myurl>, content);
I found an old reference to this in the forums about a Silverlight app that threw the same message.
I don't want to blacklist the exe since that's what I'm trying to profile. I don't see [AllowPartiallyTrustedCallers] attribute in my code anywhere (unless it's implied by the webjobs SDK). And turning off the async awareness support and running it crashed ANTSPP (I submitted the report w/ my email).
dotTrace allows the task to run and profile just fine.