Malformed class name error asking eclipse to quit - 4.7 version

[Nirav Patel]

I am using eclipse Oxygen with scala ide 4.7

I suddenly started getting following error in pop ups

"

Throwable during asyncExec

Malformed class name"

Next pop up after this tells me it is recommended to exit workbench. If I do it happens again upon restart of eclipse. 

Following is log file content. 

!ENTRY org.scala-ide.sdt.core 4 0 2018-03-21 13:03:33.805

!MESSAGE Throwable during asyncExec

!STACK 0

java.lang.InternalError: Malformed class name

        at java.lang.Class.getSimpleName(Class.java:1322)

        at java.lang.Class.isAnonymousClass(Class.java:1403)

        at org.scalaide.core.internal.logging.log4j.Log4JFacade$Logger$.apply(Log4JFacade.scala:60)

        at org.scalaide.core.internal.logging.log4j.Log4JFacade.getLogger(Log4JFacade.scala:68)

        at org.scalaide.logging.HasLogger.logger(HasLogger.scala:19)

        at org.scalaide.logging.HasLogger.logger$(HasLogger.scala:17)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector.logger$lzycompute(JUnit4TestClassesCollector.scala:17)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector.logger(JUnit4TestClassesCollector.scala:17)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector.getClassSafe(JUnit4TestClassesCollector.scala:82)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector.RunWithAnnotationOpt$lzycompute(JUnit4TestClassesCollector.scala:74)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector.RunWithAnnotationOpt(JUnit4TestClassesCollector.scala:74)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector$JUnit4TestClassesTraverser.hasRunWithAnnotation(JUnit4TestClassesCollector.scala:59)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector$JUnit4TestClassesTraverser.isTestClass(JUnit4TestClassesCollector.scala:57)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector$JUnit4TestClassesTraverser.$anonfun$isRunnableTestClass$1(JUnit4TestClassesCollector.scala:44)

        at org.scalaide.core.internal.launching.JUnit4TestClassesCollector$JUnit4TestClassesTraverser$$Lambda$2510/186495202.apply$mcZ$sp(Unknown Source)

        at scala.runtime.java8.JFunction0$mcZ$sp.apply(JFunction0$mcZ$sp.java:12)

        at scala.tools.nsc.util.InterruptReq.execute(InterruptReq.scala:26)

        at scala.tools.nsc.interactive.Global.$anonfun$pollForWork$1(Global.scala:444)

        at scala.tools.nsc.interactive.Global.pollForWork(Global.scala:418)

        at scala.tools.nsc.interactive.PresentationCompilerThread.run(PresentationCompilerThread.scala:22)

[Nirav Patel]

I just found this happens with maven project. If I remove maven nature then it works fine.