org-caldav-sync hangs in org-caldav-insert-org-entry (but is abortable with C-g)

[dnkl]

I'm trying to sync against a davmail instance running on localhost. org-caldav appears to connect successfully and is able to retreive a list of items, and the first item. However, when converting to org-mode it hangs.

  Debugger entered--Lisp error: (quit)
  re-search-forward("^[     ]*" 121 t)
  org-insert-property-drawer()
  byte-code(...)
  org-get-property-block(61 121 force)
  org-entry-put(nil "ID" "AAMkADZlOGVhZjk2LThkY2QtNDhkZS1iYWFhLTFhYWQ4MTM0OWQ5ZABGAAAAAAAZqsLuUP5cSaAaM9Gl75uFBwARo91ky-JkTIrYHN1noEz-AAAAbMrPAAARo91ky-JkTIrYHN1noEz-AAAAbPQ8AAA=")
  org-set-property("ID" "AAMkADZlOGVhZjk2LThkY2QtNDhkZS1iYWFhLTFhYWQ4MTM0OWQ5ZABGAAAAAAAZqsLuUP5cSaAaM9Gl75uFBwARo91ky-JkTIrYHN1noEz-AAAAbMrPAAARo91ky-JkTIrYHN1noEz-AAAAbPQ8AAA=")
  org-caldav-insert-org-entry("17 6 2015" "15:00" "17 6 2015" "16:30" "Convoy Weekly Meeting" "\n \n \n " "AAMkADZlOGVhZjk2LThkY2QtNDhkZS1iYWFhLTFhYWQ4MTM0OWQ5ZABGAAAAAAAZqsLuUP5cSaAaM9Gl75uFBwARo91ky-JkTIrYHN1noEz-AAAAbMrPAAARo91ky-JkTIrYHN1noEz-AAAAbPQ8AAA=" 1)
  apply(org-caldav-insert-org-entry ("17 6 2015" "15:00" "17 6 2015" "16:30" "Convoy Weekly Meeting" "\n \n \n " "AAMkADZlOGVhZjk2LThkY2QtNDhkZS1iYWFhLTFhYWQ4MTM0OWQ5ZABGAAAAAAAZqsLuUP5cSaAaM9Gl75uFBwARo91ky-JkTIrYHN1noEz-AAAAbMrPAAARo91ky-JkTIrYHN1noEz-AAAAbPQ8AAA=" 1))
  byte-code("r\306\307!!q\210\310!\311\312\313\314\n\"\"\210 @b\210\315\316\317\n   AD\"\"\210)\f\n
\3208)\321FBp)\306\207" [org-caldav-inbox point-and-level uid eventdata org-caldav-calendar-id cur find-file-noselect org-caldav-inbox-file org-caldav-inbox-point-and-level org-caldav-debug-print 1 format "Event UID %s: New in Cal --> Org inbox." apply org-caldav-insert-org-entry append 4 cal->org event org-caldav-sync-result buf] 6)
  byte-code("@\nT\306\307\nG#\210r\310  !q\210eb\210\212\311\312\313\314#\203.

Emacs version 24.5, org-mode version 8.2.10.