Same problem as desrcibed in issues: https://issues.jenkins-ci.org/browse/JENKINS-3164 and https://issues.jenkins-ci.org/browse/JENKINS-6423.

FATAL: Bounds exceeds available space : size=262144, offset=262145
java.lang.IndexOutOfBoundsException: Bounds exceeds available space : size=262144, offset=262145
at com.sun.jna.Memory.boundsCheck(Memory.java:168)
at com.sun.jna.Memory.getByte(Memory.java:394)
at hudson.util.ProcessTree$Darwin$DarwinProcess$1StringArrayMemory.skip0(ProcessTree.java:1005)
at hudson.util.ProcessTree$Darwin$DarwinProcess.parse(ProcessTree.java:1058)
at hudson.util.ProcessTree$Darwin$DarwinProcess.getEnvironmentVariables(ProcessTree.java:948)
at hudson.util.ProcessTree$OSProcess.hasMatchingEnvVars(ProcessTree.java:266)
at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:482)
at hudson.Launcher$LocalLauncher.kill(Launcher.java:721)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:446)
at hudson.model.Run.run(Run.java:1362)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:145)

on
uname -a
Darwin TheMini.local 10.7.0 Darwin Kernel Version 10.7.0: Sat Jan 29 15:17:16 PST 2011; root:xnu-1504.9.37~1/RELEASE_I386 i386