The Java 1.6 and 1.7 compilers on Continuum appears to be buggy. Compare these Commons Digester builds.
[1.5] https://continuum-ci.apache.org/continuum/buildResult.action?projectId=76&projectName=&buildId=27754&projectGroupId=0 [1.6] https://continuum-ci.apache.org/continuum/buildResult.action?projectId=76&projectName=&buildId=27753&projectGroupId=0 [1.7 https://continuum-ci.apache.org/continuum/buildResult.action?projectId=76&projectName=&buildId=27755&projectGroupId=0 The only change was the compiler version. I cannot reproduce the error on Windows with java version "1.6.0_45" Java(TM) SE Runtime Environment (build 1.6.0_45-b06) Java HotSpot(TM) Client VM (build 20.45-b01, mixed mode, sharing) or java version "1.7.0_45" Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) Client VM (build 24.45-b08, mixed mode, sharing)
