commit https://github.com/vim/vim/commit/24c77a1e3a2ad510582116229462b482d69b4b8e Author: Bram Moolenaar <Bram@vim.org> Date: Thu Mar 24 21:23:06 2016 +0100 patch 7.4.1644 Problem: Using string() on a partial that exists in the dictionary it binds results in an error. (Nikolai Pavlov) Solution: Make string() not fail on a recursively nested structure. (Ken Takta)

--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1644,
+/**/
     1643,
 /**/
     1642,