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'java.lang.AssertionError: assertion failed' Error while starting Scala-IDE(Eclipse)
Asked Answered
javaeclipsescalascala-ide
D

6

9

I am new to eclipse. Please excuse me if I am wrong about something.

I've downloaded Scala IDE for eclipse 4.6.1. I've extracted the contents and tried to launch eclipse. Initially there was a problem with maven: 'Failed to read artifact descriptor for maven-resources-plugin'. I was able to solve this error(I assume so because it didn't show up again) by adding the proxy settings to settings.xml in .m2 folder.

Now I get a new error saying: 'java.lang.AssertionError: assertion failed'

Below is the full error:

!ENTRY org.eclipse.e4.ui.workbench.swt 4 2 2017-07-10 14:34:58.379
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.e4.ui.workbench.swt".
!STACK 0
java.lang.AssertionError: assertion failed
    at scala.Predef$.assert(Predef.scala:204)
    at scala.tools.scalap.Classfile.<init>(Classfile.scala:17)
    at org.scalaide.core.internal.jdt.model.ScalaClassFileDescriber$.isScala(ScalaClassFileDescriber.scala:16)
    at org.scalaide.core.internal.jdt.model.ScalaClassFileDescriber.describe(ScalaClassFileDescriber.scala:38)
    at org.eclipse.core.internal.content.ContentTypeCatalog.describe(ContentTypeCatalog.java:229)
    at org.eclipse.core.internal.content.ContentTypeCatalog.collectMatchingByContents(ContentTypeCatalog.java:201)
    at org.eclipse.core.internal.content.ContentTypeCatalog.internalFindContentTypesFor(ContentTypeCatalog.java:412)
    at org.eclipse.core.internal.content.ContentTypeCatalog.internalFindContentTypesFor(ContentTypeCatalog.java:461)
    at org.eclipse.core.internal.content.ContentTypeCatalog.findContentTypesFor(ContentTypeCatalog.java:309)
    at org.eclipse.core.internal.content.ContentTypeMatcher.findContentTypeFor(ContentTypeMatcher.java:36)
    at org.eclipse.wst.sse.core.internal.modelhandler.ModelHandlerRegistry.getHandlerFor(ModelHandlerRegistry.java:230)
    at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.calculateType(ModelManagerImpl.java:750)
    at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForEdit(ModelManagerImpl.java:1427)
    at org.eclipse.wst.sse.ui.internal.StorageModelProvider.loadModel(StorageModelProvider.java:733)
    at org.eclipse.wst.sse.ui.internal.StorageModelProvider.loadModel(StorageModelProvider.java:705)
    at org.eclipse.wst.sse.ui.internal.StorageModelProvider.selfCreateModel(StorageModelProvider.java:761)
    at org.eclipse.wst.sse.ui.internal.StorageModelProvider.createModelInfo(StorageModelProvider.java:478)
    at org.eclipse.wst.sse.ui.internal.StorageModelProvider.createElementInfo(StorageModelProvider.java:469)
    at org.eclipse.ui.texteditor.AbstractDocumentProvider.connect(AbstractDocumentProvider.java:392)
    at org.eclipse.ui.texteditor.AbstractTextEditor.doSetInput(AbstractTextEditor.java:4178)
    at org.eclipse.ui.texteditor.StatusTextEditor.doSetInput(StatusTextEditor.java:229)
    at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.doSetInput(AbstractDecoratedTextEditor.java:1466)
    at org.eclipse.ui.editors.text.TextEditor.doSetInput(TextEditor.java:150)
    at org.eclipse.wst.sse.ui.StructuredTextEditor.doSetInput(StructuredTextEditor.java:1958)
    at org.eclipse.ui.texteditor.AbstractTextEditor$5.run(AbstractTextEditor.java:3154)
    at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2126)
    at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3172)
    at org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3197)
    at org.eclipse.wst.sse.ui.StructuredTextEditor.init(StructuredTextEditor.java:2651)
    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:240)
    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:330)
    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:214)
    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:312)
    at org.eclipse.m2e.editor.pom.MavenPomEditor.addSourcePage(MavenPomEditor.java:618)
    at org.eclipse.m2e.editor.pom.MavenPomEditor.addPages(MavenPomEditor.java:356)
    at org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:140)
    at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:363)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:150)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:99)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:340)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:966)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:931)
    at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:151)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:375)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:294)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:74)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:56)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:129)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:975)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:651)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.showTab(StackRenderer.java:1324)
    at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:103)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:669)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$1.run(PartRenderingEngine.java:536)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:520)
    at org.eclipse.e4.ui.workbench.renderers.swt.ElementReferenceRenderer.createWidget(ElementReferenceRenderer.java:70)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:975)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:651)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:142)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:142)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:142)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer.processContents(PerspectiveRenderer.java:49)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.showTab(PerspectiveStackRenderer.java:82)
    at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:103)
    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.postProcess(PerspectiveStackRenderer.java:63)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:669)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:142)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:70)
    at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:725)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:665)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:757)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$0(PartRenderingEngine.java:728)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:722)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:706)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1059)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1519)

I tried to re download eclipse and launch again. But I still get the same error.

Any help would be appreciated. Thank you.

Dylane answered 11/7, 2017 at 0:53 Comment(5)
Seems like incompatible versions. I've had better luck using IntelliJ for Scala. – Mesocarp
This doesn't answer your question, but still, you may find it helpful. Scala support in eclipse sucks big time. I was an eclipse user myself before I started with scala. After spending a couple of weeks trying to get it to work, I switched to Intellij, and never looked back. It is a superior product all around, but scala support is simply incomparable. – Achlorhydria
I agree. I've had issues with network settings on sbt. Never tried Maven on intellij though. @Achlorhydria – Dylane
Intelij doesn't have the community to support it like eclipse does. I'd recommend using the 'scala IDE for Eclipse' (scala-ide.org) version that is supported by typesafe/ lightbend / Odersky – Elburt
I get this issue when I accidentally open eclipse directly (I regularly use a script to open eclipse via command). Marek Jagielski's fix works for my situation – Elburt
T
27

I have similar issue. I manage to open eclipse without creating a new workspace by editing:

workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi

and removing from it all "persistedState" xml nodes.

UPDATE:

As other responses and comments says. Deleting file workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi seems to work well without side effects.

Tilly answered 17/8, 2017 at 20:33 Comment(6)
In my case it worked. Deleting the file may do as well. – Heteroclite
removing persistedState worked :-) perhaps you're better off deleting it – Tidbit
i think this get triggered at least for me when i built a spark project and i choose old version of the compiler and my pom was some old plugins – Tidbit
Way too many persistedState nodes to delete manually. Go with deleting the file. – Litharge
For me this happened straight after installing an m2e lifecycle adapter and (as per https://mcmap.net/q/1116441/-39-java-lang-assertionerror-assertion-failed-39-error-while-starting-scala-ide-eclipse) leaving pom.xml editors open. Deleting just the persistedState elements for pom.xml editors sorted it for me. – Headliner
@Litharge Use regular expression to delete: sed -i 's#<persistedState.*/>$##g' workbench.xmi Or if you use notepad++ use "replace all" with regular expression turned on. – Duffy
H
14

Deleting

workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi

in its entirety also works. A new workbench.xmi is generated after exiting the workspace.

Holbrook answered 19/9, 2017 at 18:39 Comment(0)
F
3

First go to below directory of your PC/Laptop/Desktop etc

**C:\Users\Username\eclipse-workspace.metadata.plugins\org.eclipse.e4.workbench**

workbench.xmi file - Delete this file without any worry

Now, start your eclipse and running great as usual.

Fading answered 14/5, 2020 at 13:2 Comment(0)
K
2

My repo case for exactly this crash was: Open any POM with m2e editor. The m2e editor tried to open in structured view (not XML mode) despite i have choosen to prefer XMl in preferences. The structured view crashed and created an endless loop of eclipse NPEs in the eclipse event loop. One has to close the window and re-open again. Then the XML views opens. As long as you have a POM open (now in XML mode) any restart of this workspace triggers this crash. The workaround (for me) was to close all POM editors before restarting eclipse.

Kizzee answered 12/7, 2017 at 7:6 Comment(3)
This does not provide an answer to the question. Once you have sufficient reputation you will be able to comment on any post; instead, provide answers that don't require clarification from the asker. - From Review – Mug
The question was: Any help would be appreciated. I gave a workaround that worked for this scenario. Additionally i do not agree that i asked for any further input. – Kizzee
@AndreasStiller That message is automatically generated (note "From Review"). – Hoem
L
0

I got this error very suddenly after I came back from a three week holiday and opened a workspace that worked perfectly before the holiday.

I have no real solution, but a workaround, that I used:

I renamed the old workspace on the filesystem. Then I created a new workspace with the old name, moved all project folders into the new workspace and imported them again into Eclipse. Could find no other way to solve this.

If someone finds out the root cause and an inplace solutions, I would be very interested.

Lopeared answered 14/8, 2017 at 13:8 Comment(0)
A
0

please report details in ticket on scala ide issue tracker

meanwhile add to the eclipse startup script a backup of workspace

cp -a workbench.xmi workbench.$(date +"%Y-%m-%d_%H-%M-%S").xmi
Alexandriaalexandrian answered 27/10, 2017 at 12:47 Comment(0)

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