Avoid NULL pointer dereferencing

diff --git a/ext/standard/string.c b/ext/standard/string.c
index 419fef3d59abda3b260c862babf1d33f011c1199..2668161c09d44bbfe8c945994a2df5152f366561 100644 (file)
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -4274,7 +4274,11 @@ PHP_FUNCTION(setlocale)
 
                                zend_string_release(loc);
                        }
-                       RETURN_STR(zend_string_copy(BG(locale_string)));
+                       if (BG(locale_string)) {
+                               RETURN_STR(zend_string_copy(BG(locale_string)));
+                       } else {
+                               RETURN_EMPTY_STRING();
+                       }
                }
                zend_string_release(loc);