checker: check arguments count of sort (#9105)

vlib/v/checker/checker.v

@@ -1323,6 +1323,10 @@ pub fn (mut c Checker) call_method(mut call_expr ast.CallExpr) table.Type {
 				c.fail_if_immutable(call_expr.left)
 				// position of `a` and `b` doesn't matter, they're the same
 				scope_register_ab(mut call_expr.scope, call_expr.pos, array_info.elem_type)
+
+				if call_expr.args.len > 1 {
+					c.error('expected 0 or 1 argument, but got $call_expr.args.len', call_expr.pos)
+				}
 				// Verify `.sort(a < b)`
 				if call_expr.args.len > 0 {
 					if call_expr.args[0].expr !is ast.InfixExpr {

vlib/v/checker/tests/array_sort_err.out

@@ -0,0 +1,6 @@
+vlib/v/checker/tests/array_sort_err.vv:3:6: error: expected 0 or 1 argument, but got 2
+    1 | fn main() {
+    2 |     mut arr := [3, 2, 1]
+    3 |     arr.sort(a < b, a)
+      |         ~~~~~~~~~~~~~~
+    4 | }

vlib/v/checker/tests/array_sort_err.vv

@@ -0,0 +1,4 @@
+fn main() {
+	mut arr := [3, 2, 1]
+	arr.sort(a < b, a)
+}