1 files changed, 44 insertions, 0 deletions
diff --git a/Zend/tests/bug67633.phpt b/Zend/tests/bug67633.phpt
new file mode 100644
index 0000000000..a9e05d10ab
--- /dev/null
+++ b/Zend/tests/bug67633.phpt
@@ -0,0 +1,44 @@
+--TEST--
+Bug #67633: A foreach on an array returned from a function not doing copy-on-write
+--FILE--
+<?php
+
+function id($x) {
+    return $x;
+}
+
+function &ref_id(&$x) {
+    return $x;
+}
+
+$c = 'c';
+$array = ['a', 'b', $c];
+
+foreach(id($array) as &$v) {
+    $v .= 'q';
+}
+var_dump($array);
+
+foreach(ref_id($array) as &$v) {
+    $v .= 'q';
+}
+var_dump($array);
+
+?>
+--EXPECT--
+array(3) {
+  [0]=>
+  string(1) "a"
+  [1]=>
+  string(1) "b"
+  [2]=>
+  string(1) "c"
+}
+array(3) {
+  [0]=>
+  string(2) "aq"
+  [1]=>
+  string(2) "bq"
+  [2]=>
+  &string(2) "cq"
+}