patch 8.0.1817: a timer may change v:count unexpectedlyv8.0.1817

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)

1 files changed, 6 insertions, 0 deletions

diff --git a/src/structs.h b/src/structs.h
index 8f35a73871..5c4a74cac7 100644
--- 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;