[xwiki-devs] how to debug an empty stack in DefaultDocumentAccessBridge?

28 Mar 2015

Hello XWiki experts,

in Curriki, we met a bug that seems related to the wysiwyg editor's
ability to accept html.

When it does so, and is input with an image, it fails the html
conversion because of the exception below for the simple (cleaned) content:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html><head></head><body><p>Image</p><p><!--startimage:false|-|attach|-|sunset-dark2.PNG--><img
alt="sunset-dark2.PNG"
src="http://node1.hoplahup.net/xwiki/bin/download/AssetTemp/dgW1kVv9l2…

Yielding the exception:
Caused by: java.lang.NullPointerException: null
    at
com.xpn.xwiki.doc.DefaultDocumentAccessBridge.getContext(DefaultDocumentAccessBridge.java:85)
~[xwiki-platform-legacy-oldcore-3.5.1.jar:na]
    at
com.xpn.xwiki.doc.DefaultDocumentAccessBridge.getAttachmentURL(DefaultDocumentAccessBridge.java:847)
~[xwiki-platform-legacy-oldcore-3.5.1.jar:na]
    at
org.xwiki.rendering.internal.wiki.XWikiWikiModel.getLinkURL(XWikiWikiModel.java:137)
~[xwiki-platform-rendering-xwiki-3.5.1.jar:na]
    at
org.xwiki.rendering.internal.wiki.XWikiWikiModel.getImageURL(XWikiWikiModel.java:153)
~[xwiki-platform-rendering-xwiki-3.5.1.jar:na]
    at
org.xwiki.rendering.internal.renderer.xhtml.image.DefaultXHTMLImageRenderer.onImage(DefaultXHTMLImageRenderer.java:120)
~[xwiki-rendering-syntax-xhtml-3.5.1.jar:na]
    at
org.xwiki.rendering.internal.renderer.xhtml.XHTMLChainingRenderer.onImage(XHTMLChainingRenderer.java:545)
~[xwiki-rendering-syntax-xhtml-3.5.1.jar:na]
    at
org.xwiki.rendering.listener.chaining.AbstractChainingListener.onImage(AbstractChainingListener.java:454)
~[xwiki-rendering-api-3.5.1.jar:na]
    at
org.xwiki.rendering.listener.chaining.AbstractChainingListener.onImage(AbstractChainingListener.java:454)
~[xwiki-rendering-api-3.5.1.jar:na]
    at
org.xwiki.rendering.listener.chaining.EmptyBlockChainingListener.onImage(EmptyBlockChainingListener.java:600)
~[xwiki-rendering-api-3.5.1.jar:na]
    at
org.xwiki.rendering.listener.chaining.AbstractChainingListener.onImage(AbstractChainingListener.java:454)
~[xwiki-rendering-api-3.5.1.jar:na]
    at
org.xwiki.rendering.listener.chaining.BlockStateChainingListener.onImage(BlockStateChainingListener.java:796)
~[xwiki-rendering-api-3.5.1.jar:na]

I am not too sure how to debug that.
Clues would be welcome.

thanks in advance.

Paul

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[xwiki-devs] how to debug an empty stack in DefaultDocumentAccessBridge?