patch 8.2.3954: Vim9: no error for shadowing if script var is declared later Commit: https://github.com/vim/vim/commit/9a015111a56d0011ced40d98f46a9841d1457b51 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Dec 31 14:06:45 2021 +0000 patch 8.2.3954: Vim9: no error for shadowing if script var is declared later Problem: Vim9: no error for shadowing if script var is declared later. Solution: Check argument names when compiling a function.

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")