Call to a member function canRead() on null

SoftCreatR · August 11, 2021 at 3:41 PM

Leider habe ich keine genaueren Informationen dazu, außer, dass der Fehler sporadisch auftritt:

Requested URL: GET /attachment/196372-bda72-jpg/

Referrer: *snip*

Error Message: Call to a member function canRead() on null

Type: Error

File (Line): /httpdocs/lib/system/attachment/ConversationMessageAttachmentObjectType.class.php (58)

Stacktrace

/httpdocs/lib/data/attachment/Attachment.class.php (125): wcf\system\attachment\ConversationMessageAttachmentObjectType->canDownload(…)
/httpdocs/lib/data/attachment/Attachment.class.php (81): wcf\data\attachment\Attachment->getPermission(…)
/httpdocs/lib/page/AttachmentPage.class.php (128): wcf\data\attachment\Attachment->canDownload(…)
/httpdocs/lib/page/AbstractPage.class.php (336): wcf\page\AttachmentPage->checkPermissions(…)
/httpdocs/lib/page/AttachmentPage.class.php (186): wcf\page\AbstractPage->show(…)
/httpdocs/lib/page/AbstractPage.class.php (122): wcf\page\AttachmentPage->show(…)
/httpdocs/lib/system/request/Request.class.php (89): wcf\page\AbstractPage->__run(…)
/httpdocs/lib/system/request/RequestHandler.class.php (119): wcf\system\request\Request->execute(…)
/httpdocs/index.php (11): wcf\system\request\RequestHandler->handle(…)

<<<<<<<<272af546d2b0ed5c72b13f51b212e9c12c6b4879<<<<
Sun, 08 Aug 2021 20:51:42 +0000
Message: Call to a member function canRead() on null
PHP version: 8.0.9
WoltLab Suite version: 5.4.2
Request URI: GET /attachment/196372-bda72-jpg/
Referrer: *snip*
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
Peak Memory Usage: 6160256/536870912
======
Error Class: Error
Error Message: Call to a member function canRead() on null
Error Code: 0
File: /httpdocs/lib/system/attachment/ConversationMessageAttachmentObjectType.class.php (58)
Extra Information: -
Stack Trace: [{"file":"\/httpdocs\/lib\/data\/attachment\/Attachment.class.php","line":125,"function":"canDownload","class":"wcf\\system\\attachment\\ConversationMessageAttachmentObjectType","type":"->","args":[]},{"file":"\/httpdocs\/lib\/data\/attachment\/Attachment.class.php","line":81,"function":"getPermission","class":"wcf\\data\\attachment\\Attachment","type":"->","args":[]},{"file":"\/httpdocs\/lib\/page\/AttachmentPage.class.php","line":128,"function":"canDownload","class":"wcf\\data\\attachment\\Attachment","type":"->","args":[]},{"file":"\/httpdocs\/lib\/page\/AbstractPage.class.php","line":336,"function":"checkPermissions","class":"wcf\\page\\AttachmentPage","type":"->","args":[]},{"file":"\/httpdocs\/lib\/page\/AttachmentPage.class.php","line":186,"function":"show","class":"wcf\\page\\AbstractPage","type":"->","args":[]},{"file":"\/httpdocs\/lib\/page\/AbstractPage.class.php","line":122,"function":"show","class":"wcf\\page\\AttachmentPage","type":"->","args":[]},{"file":"\/httpdocs\/lib\/system\/request\/Request.class.php","line":89,"function":"__run","class":"wcf\\page\\AbstractPage","type":"->","args":[]},{"file":"\/httpdocs\/lib\/system\/request\/RequestHandler.class.php","line":119,"function":"execute","class":"wcf\\system\\request\\Request","type":"->","args":[]},{"file":"\/httpdocs\/index.php","line":11,"function":"handle","class":"wcf\\system\\request\\RequestHandler","type":"->","args":[]}]
<<<<

Der Dateianhang existiert jedenfalls in der Datenbank und auch physikalisch.

Aus dem Stegreif würde ich behaupten, da hat jemand einen Anhang aus einer Konversation irgendwo außerhalb der Konversation posten wollen?

**Tim Düsterhus** · August 11, 2021 at 3:52 PM Official Post

Hallo,

unabhängig vom Problem (was ich noch nicht geprüft habe): Könntest du bitte das Format der geloggten Exception beibehalten, damit diese in das „lesbare“ Format geparsed werden kann? Den Referer kannst du beispielsweise einfach durch *snip* ersetzen.

SoftCreatR · August 11, 2021 at 3:56 PM

Sorry, den wollte ich gar nicht vollständig entfernen

**Tim Düsterhus** · September 23, 2021 at 12:10 PM Official Post

Hallo,

der Fehler betrifft verwaiste Dateianhänge, die aus irgendeinem Grund bei der Löschung der Nachricht oder der Konversation nicht ebenfalls gelöscht wurden.

Siehe:

Prevent method calls on `null` in ConversationMessageAttachmentObjectType::canDownload() by TimWolla · Pull Request #157 · WoltLab/com.woltlab.wcf.conversation

This may happen for attachments where the corresponding conversation / conversation message no longer exists. Shall we add an update script that cleans up…

github.com

**Tim Düsterhus** · September 23, 2021 at 1:42 PM Official Post

Hallo,

wie im PR diskutiert: Eine Korrektur für die Fehlermeldung kommt mit 5.4.8, die fehlerhaften Dateianhänge werden planmäßig im Zuge des Upgrades auf 5.5 aufgeräumt.

Call to a member function canRead() on null

Tim Düsterhus September 23, 2021 at 1:41 PM

Tim Düsterhus September 23, 2021 at 1:41 PM

Tim Düsterhus September 23, 2021 at 2:14 PM

Participate now!

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