patch 7.4.1454
Problem:    The exit callback test is flaky.
Solution:   Loop to wait for a short time up to a second.
diff --git a/src/version.c b/src/version.c
index 991af8d..2c21470 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1454,
+/**/
     1453,
 /**/
     1452,