Only the last parameter in a function call is allowed to use ...

[nazar-pc]

HHVM Version

HipHop VM 3.14.0-dev (rel)
Compiler: heads/master-0-gd8285fbc906f340182a2a94b1fd0cf40787a40b9
Repo schema: 093188019b394a8a53aee6c073772c7db4ffc5e6

Standalone code, or other way to reproduce the problem

$foo = ['x', 'y', 'z'];
var_dump(...$foo, ...$foo);

Expected result

~> php index.php
string(1) "x"
string(1) "y"
string(1) "z"
string(1) "x"
string(1) "y"
string(1) "z"

Actual result

~> hhvm index.php

Fatal error: Only the last parameter in a function call is allowed to use ... in * on line *

There are 2 tests: hphp/test/slow/unpack_args/unpack_call_error.php and hphp/test/slow/unpack_args/unpack_call_multi.php, but they are both wrong, such usage is completely valid in PHP7

[nazar-pc]

Submitted PR #7088, it seems to fix this strange incompatibility (looks like the one who implemented this was confused with only one ... use allowed in function declaration, while during call any number of unpacking arguments is allowed).

[jesseschalken]

This is a duplicate of #4940