diff --git a/Zend/tests/bug64578.phpt b/Zend/tests/bug64578.phpt
new file mode 100644
index 00000000000..65c51d94ffd
--- /dev/null
+++ b/Zend/tests/bug64578.phpt
@@ -0,0 +1,15 @@
+--TEST--
+Bug #64578 (debug_backtrace in set_error_handler corrupts zend heap: segfault)
+--FILE--
+<?php
+function x($s) { 
+	$resource = fopen("php://input", "r"); 
+	$s[$resource] = '2';
+}
+$y = "1";
+x($y);
+var_dump($y);
+?>
+--EXPECTF--
+Warning: Illegal offset type in %sbug64578.php on line %d
+string(1) "1"