commit https://github.com/vim/vim/commit/ea3f2e7be447a8f0c4436869620f908de5e8ef1e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jul 10 20:27:32 2016 +0200 patch 7.4.2023 Problem: buflist_findname_stat() may find a dummy buffer. Solution: Set the BF_DUMMY flag after loading a dummy buffer. Start finding buffers from the end of the list.

--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -4292,6 +4292,10 @@ load_dummy_buffer(
 	aucmd_restbuf(&aco);
 	if (newbuf_to_wipe != NULL && buf_valid(newbuf_to_wipe))
 	    wipe_buffer(newbuf_to_wipe, FALSE);
+
+	/* Add back the "dummy" flag, otherwise buflist_findname_stat() won't
+	 * skip it. */
+	newbuf->b_flags |= BF_DUMMY;
     }
 
     /*