patch 8.0.1817: a timer may change v:count unexpectedly commit https://github.com/vim/vim/commit/b0f42ba60d9e6d101d103421ba0c351811615c15 Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 12 15:38:26 2018 +0200 patch 8.0.1817: a timer may change v:count unexpectedly Problem: A timer may change v:count unexpectedly. Solution: Save and restore v:count and similar variables when a timer callback is invoked. (closes #2897)

--- a/src/structs.h
+++ b/src/structs.h
@@ -3423,3 +3423,9 @@ typedef struct {
     int		save_opcount;
     tasave_T	tabuf;
 } save_state_T;
+
+typedef struct {
+    varnumber_T vv_prevcount;
+    varnumber_T vv_count;
+    varnumber_T vv_count1;
+} vimvars_save_T;