Debugger::errorHandler() argument $context can be null

[janbarasek]

Version: 2.6.4

Bug Description

In case of imap_* function error, for example: Unknown: UID sequence range invalid (errflg=2) Tracy can not log it.

I noticed that definition of Debugger::errorHandler, parameter $context must be array, but in this specific case are given arguments in special case.

I tried dump it:

/**
 * Handler to catch warnings and notices.
 * @return bool|null   false to call normal error handler, null otherwise
 * @throws ErrorException
 * @internal
 */
public static function errorHandler(int $severity, string $message, string $file, int $line, $context = []): ?bool
{
	if (\is_array($context) === false) {
		echo Dumper::toHtml($context);
		echo Dumper::toHtml([
			'severity' => $severity,
			'message' => $message,
			'file' => $file,
			'line' => $line,
			'content' => $context,
		]);
	}

so in this case parameter $context is null and file and line is unknown.

I caused an error while trying to run old codes from this page: https://php.vrana.cz/zobrazeni-posty-na-webu.php

Steps To Reproduce

Simply call function imap_fetch_overview with invalid $sequence (second parameter).

For instance:

$imap = imap_open($root, $login, $password, OP_HALFOPEN);
imap_fetch_overview($imap, '1:0', FT_UID)

In variable $imap is valid imap resource created by imap_open().

Thanks.