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https://issues.apache.org/jira/browse/WICKET-5904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14545576#comment-14545576
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Guillaume Smet commented on WICKET-5904:
----------------------------------------
OK, got it reproduced with a simple quickstart!
How to reproduce:
- start the application using Start.java in debug mode;
- Go to the home page: you should be directed to /?0 as I added a statelessHint
to false;
- then, in Eclipse, add something to the HomePage.html markup. For instance, I
added " 2" just after the "Test" string which is in the enclosure;
- refresh the page in the browser (keeping the /?0 parameter)
You should end up with:
java.lang.IllegalArgumentException: Argument 'markup' may not be null.
at org.apache.wicket.util.lang.Args.notNull(Args.java:41)
at org.apache.wicket.markup.MarkupStream.<init>(MarkupStream.java:65)
at
org.apache.wicket.markup.html.internal.Enclosure.getChild(Enclosure.java:133)
at
org.apache.wicket.markup.html.internal.Enclosure.onConfigure(Enclosure.java:148)
at org.apache.wicket.Component.configure(Component.java:1055)
at org.apache.wicket.Component.internalBeforeRender(Component.java:940)
at org.apache.wicket.Component.beforeRender(Component.java:1017)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1712)
at org.apache.wicket.Component.onBeforeRender(Component.java:3876)
at org.apache.wicket.Component.internalBeforeRender(Component.java:949)
at org.apache.wicket.Component.beforeRender(Component.java:1017)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1712)
at org.apache.wicket.Component.onBeforeRender(Component.java:3876)
at org.apache.wicket.Page.onBeforeRender(Page.java:801)
at org.apache.wicket.Component.internalBeforeRender(Component.java:949)
> NPE after editing a markup file in debug mode
> ---------------------------------------------
>
> Key: WICKET-5904
> URL: https://issues.apache.org/jira/browse/WICKET-5904
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 7.0.0-M5
> Reporter: Guillaume Smet
> Assignee: Andrea Del Bene
> Attachments: npe-markup.tar.gz
>
>
> Hi,
> I have a weird behavior with 7.0.0-SNAPSHOT: if I update the markup in
> Eclipse debug mode (just add a class in a class attribute for instance,
> nothing fancy), I get the following exception when I reload the page without
> removing the ?version parameter:
> java.lang.IllegalArgumentException: Argument 'markup' may not be null.
> at org.apache.wicket.util.lang.Args.notNull(Args.java:41)
> at org.apache.wicket.markup.MarkupStream.<init>(MarkupStream.java:65)
> at
> org.apache.wicket.markup.html.internal.Enclosure.getChild(Enclosure.java:133)
> at
> org.apache.wicket.markup.html.internal.Enclosure.onConfigure(Enclosure.java:148)
> at org.apache.wicket.Component.configure(Component.java:1055)
> at org.apache.wicket.Component.internalBeforeRender(Component.java:940)
> at org.apache.wicket.Component.beforeRender(Component.java:1017)
> at
> org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1712)
> at org.apache.wicket.Component.onBeforeRender(Component.java:3876)
> at org.apache.wicket.Component.internalBeforeRender(Component.java:949)
> at org.apache.wicket.Component.beforeRender(Component.java:1017)
> at
> org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1712)
> at org.apache.wicket.Component.onBeforeRender(Component.java:3876)
> at org.apache.wicket.Page.onBeforeRender(Page.java:801)
> at org.apache.wicket.Component.internalBeforeRender(Component.java:949)
> at org.apache.wicket.Component.beforeRender(Component.java:1017)
> at
> org.apache.wicket.Component.internalPrepareForRender(Component.java:2214)
> at org.apache.wicket.Page.internalPrepareForRender(Page.java:242)
> I can reproduce it every time.
> If the issue isn't obvious, I can try to extract a quick start.
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