patch 8.2.2272: Vim9: extend() can violate the type of a variable Commit: https://github.com/vim/vim/commit/aa210a3aeccc33c6051978017959126b037f94af Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 2 15:41:03 2021 +0100 patch 8.2.2272: Vim9: extend() can violate the type of a variable Problem: Vim9: extend() can violate the type of a variable. Solution: Add the type to the dictionary or list and check items against it. (closes #7593)

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}\")