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Cyriptic Error when running mwe2 workflow [message #757043]

Wed, 16 November 2011 08:47

Seref Arikan

Messages: 73
Registered: August 2010

Member

Greeetings,
I've used an existing XML schema to create an Ecore model, I've then generated model code, and created an Xtext project using the existing ecore model.

When I run the mwe2 workflow with the generated grammar, I end up with the following error on console, which does not tell me anything. Maybe someone may have an idea about what is wrong here. This is Indigo 64 bit under windows 7 Enterprise 64 bit with Java 6. The interesting thing is, this setup has worked before in a previous Eclipse release (I think it was Helios)

Best regards
Seref

the console output is:

2614 [main] INFO ipse.xtext.generator.LanguageConfig - generating infrastructure for Archelang with fragments : ImplicitRuntimeFragment, ImplicitUiFragment, GrammarAccessFragment, ParseTreeConstructorFragment, ResourceFactoryFragment, XtextAntlrGeneratorFragment, Ecore2XtextValueConverterServiceFragment, JavaValidatorFragment, ImportURIScopingFragment, SimpleNamesFragment, FormatterFragment, LabelProviderFragment, OutlineTreeProviderFragment, QuickOutlineFragment, JavaBasedContentAssistFragment, XtextAntlrUiGeneratorFragment, CompareFragment, BuilderIntegrationFragment, QuickfixProviderFragment
23915 [main] INFO or.validation.JavaValidatorFragment - generating Java-based EValidator API
33923 [main] INFO text.generator.junit.Junit4Fragment - generating Compare Framework infrastructure
33981 [main] ERROR g.eclipse.xtext.generator.Generator - java.lang.NullPointerException
org.eclipse.emf.common.util.WrappedException: java.lang.NullPointerException
at org.eclipse.xtext.generator.Generator.mergeManifest(Generator.java:408)
at org.eclipse.xtext.generator.Generator.generateManifestRt(Generator.java:375)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:134)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:97)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:73)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:64)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:55)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
Caused by: java.lang.NullPointerException
at org.eclipse.xtext.generator.MergeableManifest.mergeIntoCommaSeparatedList(MergeableManifest.java:306)
at org.eclipse.xtext.generator.MergeableManifest.addExportedPackages(MergeableManifest.java:257)
at org.eclipse.xtext.generator.Generator.mergeManifest(Generator.java:396)
... 13 more
33982 [main] INFO .emf.mwe2.runtime.workflow.Workflow - Done.

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Re: Cyriptic Error when running mwe2 workflow [message #757047 is a reply to message #757043]

Wed, 16 November 2011 08:54

Meinte Boersma

Messages: 434
Registered: July 2009
Location: Leiden, Netherlands

Senior Member

Apparently, there's a problem in the manifest of either of the plugins (non-UI, UI, tests?). It may be that it's corrupt in some way. If there's a manifest.mf_gen then you should compare that with the manifest.mf to see what's wrong. If not, sanitizing the manifest by comparing it with the "clean" manifests from a working Xtext project is your only option.

Xtext blogs: executable models...again? | workshop material | custom scoping with Xtend

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Re: Cyriptic Error when running mwe2 workflow [message #757054 is a reply to message #757047]

Wed, 16 November 2011 09:33

Seref Arikan

Messages: 73
Registered: August 2010

Member

Silly me! I should have used a namespace for the grammar. Thanks for your response

Regards
Seref

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Re: Cyriptic Error when running mwe2 workflow [message #757077 is a reply to message #757054]

Wed, 16 November 2011 11:57

Meinte Boersma

Messages: 434
Registered: July 2009
Location: Leiden, Netherlands

Senior Member

I think this could even be construed as a bug. However deprecated the use of the default namespace might be, generators like this shouldn't trip over it or provides warnings/errors in the appropriate places.

Xtext blogs: executable models...again? | workshop material | custom scoping with Xtend

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Re: Cyriptic Error when running mwe2 workflow [message #757088 is a reply to message #757077]

Wed, 16 November 2011 13:05

Seref Arikan

Messages: 73
Registered: August 2010

Member

Well, in the old days, Eclipse would not let you use the default namespace, but used to tell you this. I found out my problem since the generated project ended up with a bunch of "null" directories and statements.

It would be nice to be warned Smile