`assert()` failure errors do not correctly handle ASTs with strings containing NUL

[TimWolla]

Description

The following code:

<?php

try {
	$string = "Foo\x00bar";
	assert(!str_contains($string, "\x00"));
} catch (Error $e) {
	echo $e->getMessage(), PHP_EOL;
}

Resulted in this output:

assert(!str_contains($string, '

But I expected this output instead: The closing ')); should not be cut off. Ideally the NUL byte would be output in escaped form.

PHP Version

PHP 8.6.0-dev (cli) (built: Jun 13 2026 14:01:23) (NTS DEBUG)
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Operating System

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