diff -up evolution-3.8.5/mail/importers/mail-importer.c.crash-pine-import evolution-3.8.5/mail/importers/mail-importer.c
--- evolution-3.8.5/mail/importers/mail-importer.c.crash-pine-import	2013-07-23 14:51:50.000000000 +0200
+++ evolution-3.8.5/mail/importers/mail-importer.c	2014-01-23 15:29:19.659030980 +0100
@@ -277,7 +277,7 @@ mail_importer_import_mbox_sync (EMailSes
 	m->path = g_strdup (path);
 	m->uri = g_strdup (folderuri);
 	if (cancellable)
-		m->base.cancellable = cancellable;
+		m->base.cancellable = g_object_ref (cancellable);
 
 	cancellable = m->base.cancellable;