Can you provide a self-contained example so that I can (try to) reproduce this?

Minimal self-contained example:

function testFoo($bar)
{
throw new \Exception();
}

try {
testFoo('foobar');
} catch (Exception $exception) {
var_dump($exception);
}

This can be also reproduced in the web context.

That outputs:

<pre>
derick@singlemalt:~$ php -dxdebug.var_display_max_depth=6 /tmp/goo.php
/tmp/goo.php:10:
class Exception#1 (8) {
protected $message =>
string(0) ""
private $string =>
string(0) ""
protected $code =>
int(0)
protected $file =>
string(12) "/tmp/goo.php"
protected $line =>
int(4)
private $trace =>
array(1) {
[0] =>
array(4) {
'file' =>
string(12) "/tmp/goo.php"
'line' =>
int(8)
'function' =>
string(7) "testFoo"
'args' =>
array(1) {
[0] =>
string(6) "foobar"
}
}
}
private $previous =>
NULL
public $xdebug_message =>
string(170) "
Exception: in /tmp/goo.php on line 4

Call Stack:
0.0006 384360 1. {main}() /tmp/goo.php:0
0.0006 384360 2. testFoo($bar = 'foobar') /tmp/goo.php:8
"
}
</pre>

Which looks correct to me?

Sorry for the false issue (this is not related to Xdebug after all), further debugging showed that this was due to the new zend.exception_ignore_args INI directive which was added in PHP 7.4 : https://www.php.net/manual/en/migration74.other-changes.php

OK. Thanks for checking! I'll make sure to add a test so this won't get lost.

Closing this out - thanks for telling me what went wrong :-)