patch 7.4.1877
Problem:    No test for invoking "close_cb" when writing to a buffer.
Solution:   Add using close_cb to a test case.
diff --git a/src/version.c b/src/version.c
index bc78923..aeed591 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1877,
+/**/
     1876,
 /**/
     1875,