1--TEST--
2If the LHS of ref-assign ERRORs, that takes precedence over the "only variables" notice
3--FILE--
4<?php
5
6function val() {
7    return 42;
8}
9
10$var = 24;
11$arr = [PHP_INT_MAX => "foo"];
12try {
13    var_dump($arr[] =& $var);
14} catch (Error $e) {
15    echo $e->getMessage(), "\n";
16}
17var_dump(count($arr));
18try {
19    var_dump($arr[] =& val());
20} catch (Error $e) {
21    echo $e->getMessage(), "\n";
22}
23var_dump(count($arr));
24
25?>
26--EXPECT--
27Cannot add element to the array as the next element is already occupied
28int(1)
29Cannot add element to the array as the next element is already occupied
30int(1)
31