1 files changed, 16 insertions, 0 deletions
diff --git a/ext/mbstring/tests/mb_convert_encoding_leak.phpt b/ext/mbstring/tests/mb_convert_encoding_leak.phpt
new file mode 100644
index 0000000000..4e626b0894
--- /dev/null
+++ b/ext/mbstring/tests/mb_convert_encoding_leak.phpt
@@ -0,0 +1,16 @@
+--TEST--
+mb_convert_encoding() shouldn't leak keys
+--FILE--
+<?php
+
+$x = "x";
+$array = ["foo" . $x => "bar"];
+mb_convert_encoding($array, 'UTF-8', 'UTF-8');
+var_dump($array);
+
+?>
+--EXPECT--
+array(1) {
+  ["foox"]=>
+  string(3) "bar"
+}