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/cindent.c
+++ b/src/cindent.c
@@ -4129,6 +4129,9 @@ f_cindent(typval_T *argvars UNUSED, typv
     pos_T	pos;
     linenr_T	lnum;
 
+    if (in_vim9script() && check_for_lnum_arg(argvars, 0) == FAIL)
+	return;
+
     pos = curwin->w_cursor;
     lnum = tv_get_lnum(argvars);
     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)