commit 10ce39a0d52272a3dfff2feb8c631529f29e6740
author Bram Moolenaar <Bram@vim.org> Fri Jul 29 22:37:06 2016 +0200
committer Bram Moolenaar <Bram@vim.org> Fri Jul 29 22:37:06 2016 +0200
tree 4e87632c06cd48950bf777c27be36cb309a8fcb4
parent 1e96d9bf98f9ab84d5af7f98d6a961d91b17364f

patch 7.4.2120
Problem:    User defined functions can't be a closure.
Solution:   Add the "closure" argument. Allow using :unlet on a bound
            variable. (Yasuhiro Matsumoto, Ken Takata)

src/eval.c

diff --git a/src/eval.c b/src/eval.c
index 463c892..956f05c 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2837,7 +2837,9 @@
 	    }
 	}
 	hi = hash_find(ht, varname);
-	if (!HASHITEM_EMPTY(hi))
+	if (HASHITEM_EMPTY(hi))
+	    hi = find_hi_in_scoped_ht(name, &varname, &ht);
+	if (hi != NULL && !HASHITEM_EMPTY(hi))
 	{
 	    di = HI2DI(hi);
 	    if (var_check_fixed(di->di_flags, name, FALSE)