failing build

Hi Everyone,I have a maven build that dies on the scala compile with a StackOverflowError. I am using scala 2.9.1. The weird bit is this only happens on the build server and not on the client boxes.
Hopefully someone can nudge me in the right direction on this.
regards, Glen


PS Here is a snippet of the stack trace.
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4144)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedApply$1$1.apply(Typers.scala:3353)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedApply$1$1.apply(Typers.scala:3353)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.silent(Typers.scala:624)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:3353)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4104)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typedBlock(Typers.scala:1920)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3951)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.scala:4350)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typedQualifier(Typers.scala:4356)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4144)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedApply$1$1.apply(Typers.scala:3353)
[INFO]  at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$typedApply$1$1.apply(Typers.scala:3353)
[INFO]