diff --git a/src/vim9compile.c b/src/vim9compile.c
index 026b18f..a243e64 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -1639,7 +1639,6 @@
 	int	    c = var_start[varlen];
 	int	    lines_len = cctx->ctx_ufunc->uf_lines.ga_len;
 	char_u	    *p = var_start;
-	garray_T    *stack = &cctx->ctx_type_stack;
 	int	    res;
 
 	// Evaluate "ll[expr]" of "ll[expr][idx]".  End the line with a NUL and
@@ -1657,8 +1656,8 @@
 	    return FAIL;
 	}
 
-	lhs->lhs_type = stack->ga_len == 0 ? &t_void
-			      : ((type_T **)stack->ga_data)[stack->ga_len - 1];
+	lhs->lhs_type = cctx->ctx_type_stack.ga_len == 0 ? &t_void
+						  : get_type_on_stack(cctx, 0);
 	// now we can properly check the type
 	if (rhs_type != NULL && lhs->lhs_type->tt_member != NULL
 		&& rhs_type != &t_void
@@ -1717,7 +1716,6 @@
 	cctx_T	*cctx)
 {
     vartype_T	dest_type;
-    garray_T    *stack = &cctx->ctx_type_stack;
     int		range = FALSE;
 
     if (compile_assign_index(var_start, lhs, &range, cctx) == FAIL)
@@ -1753,12 +1751,12 @@
 
 	    if (range)
 	    {
-		type = ((type_T **)stack->ga_data)[stack->ga_len - 2];
+		type = get_type_on_stack(cctx, 1);
 		if (need_type(type, &t_number,
 					    -1, 0, cctx, FALSE, FALSE) == FAIL)
 		return FAIL;
 	    }
-	    type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
+	    type = get_type_on_stack(cctx, 0);
 	    if ((dest_type != VAR_BLOB && type != &t_special)
 		    && need_type(type, &t_number,
 					    -1, 0, cctx, FALSE, FALSE) == FAIL)
@@ -1837,7 +1835,6 @@
     int		semicolon = 0;
     int		did_generate_slice = FALSE;
     garray_T	*instr = &cctx->ctx_instr;
-    garray_T    *stack = &cctx->ctx_type_stack;
     char_u	*op;
     int		oplen = 0;
     int		heredoc = FALSE;
@@ -1929,8 +1926,8 @@
 	    int		needed_list_len;
 	    int		did_check = FALSE;
 
-	    stacktype = stack->ga_len == 0 ? &t_void
-			      : ((type_T **)stack->ga_data)[stack->ga_len - 1];
+	    stacktype = cctx->ctx_type_stack.ga_len == 0 ? &t_void
+						  : get_type_on_stack(cctx, 0);
 	    if (stacktype->tt_type == VAR_VOID)
 	    {
 		emsg(_(e_cannot_use_void_value));
@@ -2073,8 +2070,8 @@
 			goto theend;
 		}
 
-		rhs_type = stack->ga_len == 0 ? &t_void
-			      : ((type_T **)stack->ga_data)[stack->ga_len - 1];
+		rhs_type = cctx->ctx_type_stack.ga_len == 0 ? &t_void
+						  : get_type_on_stack(cctx, 0);
 		if (lhs.lhs_lvar != NULL && (is_decl || !lhs.lhs_has_type))
 		{
 		    if ((rhs_type->tt_type == VAR_FUNC
@@ -2230,7 +2227,7 @@
 	    else
 	    {
 		expected = lhs.lhs_member_type;
-		stacktype = ((type_T **)stack->ga_data)[stack->ga_len - 1];
+		stacktype = get_type_on_stack(cctx, 0);
 		if (
 #ifdef FEAT_FLOAT
 		    // If variable is float operation with number is OK.
@@ -2527,7 +2524,8 @@
     cctx.ctx_lnum = -1;
     cctx.ctx_outer = outer_cctx;
     ga_init2(&cctx.ctx_locals, sizeof(lvar_T), 10);
-    ga_init2(&cctx.ctx_type_stack, sizeof(type_T *), 50);
+    // Each entry on the type stack consists of two type pointers.
+    ga_init2(&cctx.ctx_type_stack, sizeof(type2_T), 50);
     ga_init2(&cctx.ctx_imports, sizeof(imported_T), 10);
     cctx.ctx_type_list = &ufunc->uf_type_list;
     ga_init2(&cctx.ctx_instr, sizeof(isn_T), 50);
@@ -2564,7 +2562,6 @@
 	SOURCING_LNUM = 0;  // line number unknown
 	for (i = 0; i < count; ++i)
 	{
-	    garray_T	*stack = &cctx.ctx_type_stack;
 	    type_T	*val_type;
 	    int		arg_idx = first_def_arg + i;
 	    where_T	where = WHERE_INIT;
@@ -2588,7 +2585,7 @@
 	    // If no type specified use the type of the default value.
 	    // Otherwise check that the default value type matches the
 	    // specified type.
-	    val_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
+	    val_type = get_type_on_stack(&cctx, 0);
 	    where.wt_index = arg_idx + 1;
 	    if (ufunc->uf_arg_types[arg_idx] == &t_unknown)
 	    {