This series fixes two bugs introduces in notmuch 0.24 1) queries of the form 'from:foo*' and 'subject:bar*' no longer work (the * is just silently dropped) 2) queries of the form 'from:""' and 'subject:""' crashes with an uncaught exception. Unless there objections, I'll probably roll these patches (along with perhaps the two memory fixes recently posted) into a bugfix release 0.24.1. Tentative release date early next week. d