Exception ao abrir projeto

Bom dia galera

Meu projeto está mostrando este erro já qdo abre o eclipse.

Internal validation error java.lang.NullPointerException at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.CompilationUnitBinding.sourceMethod(CompilationUnitBindi
 ng.java:83) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.MethodBinding.sourceMethod(MethodBinding.java:553) 
 at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.j
 ava:1068) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.j
 ava:1054) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding.methods(SourceTypeBinding.java:
 779) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.MethodBinding.ensureBindingsAreComplete(MethodBindin
 g.java:623) at org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.findMethod(Scope.java:638) at 
 org.eclipse.wst.jsdt.internal.compiler.lookup.Scope.getImplicitMethod(Scope.java:1635) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:325) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.resolveType(FieldReference.java:346) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.FieldReference.resolveType(FieldReference.java:275) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:279) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MessageSend.resolveType(MessageSend.java:267) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.ReturnStatement.resolve(ReturnStatement.java:146) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMeth
 odDeclaration.java:350) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.ja
 va:137) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclarati
 on.java:304) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclarati
 on.java:375) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.FunctionExpression.resolveType(FunctionExpression.java:
 58) at org.eclipse.wst.jsdt.internal.compiler.ast.Assignment.resolveType(Assignment.java:160) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.Expression.resolve(Expression.java:477) at 
 org.eclipse.wst.jsdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaratio
 n.java:394) at org.eclipse.wst.jsdt.internal.compiler.Compiler.process(Compiler.java:604) at 
 org.eclipse.wst.jsdt.internal.compiler.Compiler.compile(Compiler.java:356) at 
 org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:
 288) at org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:
 86) at 
 org.eclipse.wst.jsdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:
 227) at org.eclipse.wst.jsdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:58) 
 at org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:291) at 
 org.eclipse.wst.jsdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:194) at 
 org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:728) at 
 org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at 
 org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199) at 
 org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239) at 
 org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292) at 
 org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at 
 org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295) at 
 org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351) at 
 org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374) at 
 org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143) at 
 org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241) at 
 org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Alguém já teve este erro?

Att. Diego Silva

Erro do próprio Eclipse. Ele acontece com outros projetos?

Pode ser algum plugin que corrompeu.

Se você baixar um outro eclipse, o mesmo erro acontece?