1 files changed, 40 insertions, 0 deletions
diff --git a/tests/lang/foreachLoop.010.phpt b/tests/lang/foreachLoop.010.phpt
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+++ b/tests/lang/foreachLoop.010.phpt
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+--TEST--
+This test illustrates the impact of invoking destructors when refcount is decremented to 0 on foreach.
+It will pass only if the 'contentious code' in PHPValue.decReferences() is enabled.
+--FILE--
+<?php
+
+$a = array(1,2,3);
+$container = array(&$a);
+
+// From php.net:  
+//   "Unless the array is referenced, foreach operates on a copy of
+//    the specified array and not the array itself."
+// At this point, the array $a is referenced.
+
+// The following line ensures $a is no longer references as a consequence
+// of running the 'destructor' on $container.  
+$container = null;
+
+// At this point the array $a is no longer referenced, so foreach should operate on a copy of the array.
+// However, P8 does not invoke 'destructors' when refcount is decremented to 0.
+// Consequently, $a thinks it is still referenced, and foreach will operate on the array itself.
+// This provokes a difference in behaviour when changing the number of elements in the array while
+// iterating over it.  
+
+$i=0;
+foreach ($a as $v) {
+	array_push($a, 'new');
+	var_dump($v);
+	
+	if (++$i>10) {
+		echo "Infinite loop detected\n";
+		break;
+	}
+}
+
+?>
+--EXPECTF--
+int(1)
+int(2)
+int(3)
+\ No newline at end of file