patch 8.1.1795: no syntax HL after splitting windows with :bufdo commit https://github.com/vim/vim/commit/c7f1e4002184903f4e12e429dd5c6ab731932f86 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 3 13:29:46 2019 +0200 patch 8.1.1795: no syntax HL after splitting windows with :bufdo Problem: No syntax HL after splitting windows with :bufdo. (Yasuhiro Matsumoto) Solution: Trigger Syntax autocommands in buffers that are active. (closes #4761)

--- a/src/option.c
+++ b/src/option.c
@@ -7931,6 +7931,7 @@ did_set_string_option(
 	    // recursively, to avoid endless recurrence.
 	    apply_autocmds(EVENT_SYNTAX, curbuf->b_p_syn, curbuf->b_fname,
 		    value_changed || syn_recursive == 1, curbuf);
+	    curbuf->b_flags |= BF_SYN_SET;
 	    --syn_recursive;
 	}
 #endif