var_dump prints empty bodies for associative and sparse arrays

[nahime0]

Description

var_dump() reports the correct array count for non-list arrays, but drops every element from the printed body. The underlying array data still exists (count() and array_key_exists() keep working), so this looks like a debug/runtime formatting bug specific to associative and sparse arrays.

Steps to reproduce

<?php var_dump(["x" => 1]);

A second minimal variant shows the same bug for sparse integer keys:

<?php var_dump([2 => "b"]);

Expected behavior

PHP 8.4.19 prints the array entries, including their keys and values:

array(1) {
  ["x"]=>
  int(1)
}

and:

array(1) {
  [2]=>
  string(1) "b"
}

Actual behavior

Elephc prints an empty array body while still reporting the right element count:

array(1) {
}

Notes

The data itself appears to survive internally. This program still prints 1,yes under Elephc:

<?php $a = ["x" => 1]; echo count($a), ",", array_key_exists("x", $a) ? "yes" : "no";

Environment

• Elephc commit: 02ffd63c0efdd8b5dd4069e0b6bd58dfe2a9325d
• PHP: 8.4.19
• OS: Darwin 25.5.0 arm64
• Reproduced on: 2026-06-04T07:05:57Z