Prevent ResourceBundle double-construction

Author: nikic

ext/intl/resourcebundle/resourcebundle_class.c

@@ -93,6 +93,11 @@ static int resourcebundle_ctor(INTERNAL_FUNCTION_PARAMETERS)
 		return FAILURE;
 	}
 
+	if (rb->me) {
+		zend_throw_error(NULL, "ResourceBundle object is already constructed");
+		return FAILURE;
+	}
+
 	INTL_CHECK_LOCALE_LEN_OR_FAILURE(locale_len);
 
 	if (locale == NULL) {

ext/intl/tests/resourcebundle_double_ctor.phpt

@@ -0,0 +1,18 @@
+--TEST--
+ResourceBundle double construction should not be allowed
+--SKIPIF--
+<?php if( !extension_loaded( 'intl' ) ) print 'skip'; ?>
+--FILE--
+<?php
+
+include "resourcebundle.inc";
+$r = new ResourceBundle('en_US', BUNDLE);
+try {
+    $r->__construct('en_US', BUNDLE);
+} catch (Error $e) {
+    echo $e->getMessage(), "\n";
+}
+
+?>
+--EXPECT--
+ResourceBundle object is already constructed