Created attachment 601159 [details] backtrace evolution Description of problem:
Created attachment 601160 [details] backtrace evolution-calendar-factory
Thanks for a bug report. This is different from your previous stuck on calendar invite, this one is blocking calendar factory in the main thread, but on a very strange place, in prepare_create_item_with_mime_content_request(), which is not possible in the code. I see from the backtrace that the g_timeout_dispatch() doesn't have exact start of the function, it is shifted slightly inside it, which might mean that there happened a memory corruption in the calendar factory process.
Created attachment 601665 [details] proposed ews patch for evolution-ews; I'm not sure whether this will help, though I didn't find anything obvious on the first look. I'm building a test package at [1], give it a try, please. [1] http://koji.fedoraproject.org/koji/taskinfo?taskID=4347231
Created commit 52d5998 in ews master (3.5.90+) Created commit e624a91 in ews gnome-3-4 (3.4.4+)