diff --git a/Zend/tests/bug29890.phpt b/Zend/tests/bug29890.phpt
new file mode 100644
index 00000000000..32e8e1bd5db
--- /dev/null
+++ b/Zend/tests/bug29890.phpt
@@ -0,0 +1,23 @@
+--TEST--
+Bug #29890 (crash if error handler fails)
+--FILE--
+<?php
+function customErrorHandler($fErrNo,$fErrStr,$fErrFile,$fErrLine,&$fClass) {
+echo "error :".$fErrStr."\n";
+}
+
+set_time_limit(5);
+
+error_reporting(E_ALL);
+
+set_error_handler("customErrorHandler");
+
+define("TEST",2);
+
+//should return a notice that the constant is already defined
+
+define("TEST",3);
+
+?>
+--EXPECT--
+error :Constant TEST already defined