the error log:
ENTRY org.eclipse.core.resources 4 75 2011-05-17 10:57:46.011
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.jboss.tools.cdi.core 4 75 2011-05-17 10:57:46.011
!MESSAGE Errors running builder 'CDI (Context and Dependency Injection) Builder' on project 'myproject'.
!STACK 0
java.lang.StringIndexOutOfBoundsException: String index out of range: -34
at java.lang.String.substring(String.java:1937)
at org.jboss.tools.cdi.internal.core.impl.definition.MethodDefinition.loadParamDefinitions(MethodDefinition.java:88)
at org.jboss.tools.cdi.internal.core.impl.definition.MethodDefinition.init(MethodDefinition.java:64)
at org.jboss.tools.cdi.internal.core.impl.definition.AbstractMemberDefinition.setAnnotatable(AbstractMemberDefinition.java:50)
at org.jboss.tools.cdi.internal.core.impl.definition.MethodDefinition.setMethod(MethodDefinition.java:49)
at org.jboss.tools.cdi.internal.core.impl.definition.TypeDefinition.init(TypeDefinition.java:62)
at org.jboss.tools.cdi.internal.core.impl.definition.AbstractMemberDefinition.setAnnotatable(AbstractMemberDefinition.java:50)
at org.jboss.tools.cdi.internal.core.impl.definition.AbstractTypeDefinition.setType(AbstractTypeDefinition.java:54)
at org.jboss.tools.cdi.internal.core.scanner.CDIBuilderDelegate.build(CDIBuilderDelegate.java:56)
at org.jboss.tools.cdi.core.CDICoreBuilder.fullBuild(CDICoreBuilder.java:190)
at org.jboss.tools.cdi.core.CDICoreBuilder.build(CDICoreBuilder.java:155)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:317)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:242)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54
I wanted to update my plugins via nightly build to fix that error, but as pointed here http://community.jboss.org/message/605581, it seems, the update site is down.