...

diff --git a/phpdbg_cmd.c b/phpdbg_cmd.c
index 4d34be74a917ee28e1fb09b8dcef6a828578f730..95e1642368884472ff88667e26080250387fa2af 100644 (file)
--- a/phpdbg_cmd.c
+++ b/phpdbg_cmd.c
@@ -585,7 +585,7 @@ PHPDBG_API int phpdbg_stack_verify(const phpdbg_command_t *command, phpdbg_param
        return FAILURE; \
 }
 
-               while (arg) {
+               while (arg && *arg) {
                        current++;
                        
                        switch (*arg) {