fix

vlib/v/checker/fn.v

@@ -1684,15 +1684,21 @@ fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool) ast.
 					}
 				}
 				out: for n in 0 .. arg_typ_sym.info.types.len {
+					num_arg := n + 1
 					curr_arg := arg_typs[n]
 					multi_param := if func.is_variadic && i >= func.params.len - 1 {
 						func.params.last()
 					} else {
-						func.params[n + i]
+						if func.params.len - 1 < num_arg {
+							c.error('missing argument ${i + num_arg} on `${fn_name}` to receive ${c.table.type_to_str(arg_typ)}',
+								call_arg.pos)
+							continue out
+						}
+						func.params[num_arg]
 					}
 					c.check_expected_call_arg(curr_arg, c.unwrap_generic(multi_param.typ),
 						node.language, call_arg) or {
-						c.error('${err.msg()} in argument ${i + n + 1} to `${fn_name}` from ${c.table.type_to_str(arg_typ)}',
+						c.error('${err.msg()} in argument ${i + num_arg} to `${fn_name}` from ${c.table.type_to_str(arg_typ)}',
 							call_arg.pos)
 						continue out
 					}

vlib/v/checker/tests/multi_return_arg_missing_err.out

@@ -0,0 +1,6 @@
+vlib/v/checker/tests/multi_return_arg_missing_err.vv:9:7: error: missing argument 3 on `t` to receive (int, int)
+    7 | 
+    8 | fn main() {
+    9 |     t(1, g())
+      |          ~~~
+   10 | }

vlib/v/checker/tests/multi_return_arg_missing_err.vv

@@ -0,0 +1,10 @@
+fn t(a int, b int) {
+}
+
+fn g() (int, int) {
+	return 1, 1
+}
+
+fn main() {
+	t(1, g())
+}