commit 49439c4cdf7d2822255f292adda4226656fe144d
author Bram Moolenaar <Bram@vim.org> Mon Feb 20 23:07:05 2017 +0100
committer Bram Moolenaar <Bram@vim.org> Mon Feb 20 23:07:05 2017 +0100
tree 2007c8f88c26e6aab7ce8d2696d57eb8637ae28f
parent e7877fe0de1426f8de9ada825e4f7b64810c7dbc

patch 8.0.0344: unlet command leaks memory

Problem:    Unlet command leaks memory. (Nikolai Pavlov)
Solution:   Free the memory on error. (closes #1497)

src/eval.c

diff --git a/src/eval.c b/src/eval.c
index 3cd73b6..b835af8 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2079,7 +2079,10 @@
 	    }
 	    /* existing variable, need to check if it can be changed */
 	    else if (var_check_ro(lp->ll_di->di_flags, name, FALSE))
+	    {
+		clear_tv(&var1);
 		return NULL;
+	    }
 
 	    if (len == -1)
 		clear_tv(&var1);