patch 7.4.1639
Problem:    Invoking garbage collection may cause a double free.
Solution:   Don't free the dict in a partial when recursive is FALSE.
diff --git a/src/version.c b/src/version.c
index 1a02fbe..6fffeeb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1639,
+/**/
     1638,
 /**/
     1637,