patch 8.2.3229: Vim9: runtime and compile time type checks are not the same Commit: https://github.com/vim/vim/commit/4490ec4e839e45a2e6923c265c7e9e64c240b805 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Tue Jul 27 22:00:44 2021 +0200 patch 8.2.3229: Vim9: runtime and compile time type checks are not the same Problem: Vim9: runtime and compile time type checks are not the same. Solution: Add more runtime type checks for builtin functions. (Yegappan Lakshmanan, closes #8646)

--- a/src/mark.c
+++ b/src/mark.c
@@ -1510,6 +1510,9 @@ f_getmarklist(typval_T *argvars, typval_
     if (rettv_list_alloc(rettv) != OK)
 	return;
 
+    if (in_vim9script() && check_for_opt_buffer_arg(argvars, 0) == FAIL)
+	return;
+
     if (argvars[0].v_type == VAR_UNKNOWN)
     {
 	get_global_marks(rettv->vval.v_list);