commit https://github.com/vim/vim/commit/7b668e83d0635d082b7ec90d7d2aa30a9d7d8928 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 23 23:51:21 2016 +0200 patch 7.4.2244 Problem: Adding pattern to ":oldfiles" is not a generic solution. Solution: Add the ":filter /pat/ cmd" command modifier. Only works for some commands right now.

--- a/src/structs.h
+++ b/src/structs.h
@@ -571,6 +571,7 @@ typedef struct
 # ifdef FEAT_AUTOCMD
     char_u	*save_ei;		/* saved value of 'eventignore' */
 # endif
+    regmatch_T	filter_regmatch;	/* set by :filter /pat/ */
 } cmdmod_T;
 
 #define MF_SEED_LEN	8