Add test for issue #94 ((PHP7 segmentation fault with references))

tests/issue094.phpt

@@ -0,0 +1,54 @@
+--TEST--
+Issue #94 (PHP7 segmentation fault with references)
+--SKIPIF--
+<?php
+if (!extension_loaded("msgpack")) {
+   echo "skip"; 
+}
+--FILE--
+<?php
+$bad = unserialize('a:4:{i:1;a:1:{s:10:"verylongid";s:1:"1";}i:10;a:1:{s:10:"verylongid";s:2:"10";}i:16;a:1:{s:10:"verylongid";s:2:"16";}i:0;a:1:{s:8:"children";a:3:{i:16;R:6;i:10;R:4;i:1;R:2;}}}');
+$p = msgpack_pack($bad);
+print_r(msgpack_unpack($p));
+--EXPECT--
+Array
+(
+    [1] => Array
+        (
+            [verylongid] => 1
+        )
+
+    [10] => Array
+        (
+            [verylongid] => 10
+        )
+
+    [16] => Array
+        (
+            [verylongid] => 16
+        )
+
+    [0] => Array
+        (
+            [children] => Array
+                (
+                    [16] => Array
+                        (
+                            [verylongid] => 16
+                        )
+
+                    [10] => Array
+                        (
+                            [verylongid] => 10
+                        )
+
+                    [1] => Array
+                        (
+                            [verylongid] => 1
+                        )
+
+                )
+
+        )
+
+)