From: Weng Xuetian <wengxt@gmail.com>
Date: Mon, 18 Dec 2017 17:24:51 -0800
Subject: Fix memory leak caused by hacking strv length.

Applied-Upstream: commit:7d365e11abb78cdab0e99d78059ebc1f4fa4d864

generated _vala_array_free relies length to free the data correctly.
Change the value to -1 will affect the behavior of _vala_array_free.
---
 libkkc/key-event.vala | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libkkc/key-event.vala b/libkkc/key-event.vala
index 6e28aa6..308bcf5 100644
--- a/libkkc/key-event.vala
+++ b/libkkc/key-event.vala
@@ -192,8 +192,13 @@ namespace Kkc {
                 // newer valac thinks null in a fixed length array as
                 // an empty string
                 var array = elements.to_array ();
+                // Change length of strv may make vala no able to free it
+                // correctly. Save the length and restore it later.
+                var old_length = array.length;
                 array.length = -1;
-                return "(" + string.joinv (" ", array) + ")";
+                var key_string = "(" + string.joinv (" ", array) + ")";
+                array.length = old_length;
+                return key_string;
             } else {
                 return _base;
             }