java.lang.LinkageError duplicate class definition

```
What steps will reproduce the problem?
1. Try to benchmark code that has guava-17.0 as a dependency.

What is the expected output? What do you see instead?
Expect benchmarks to run, instead see this:

com.google.caliper.runner.ProxyWorkerException: An exception occurred in a
worker process. The stack trace is as follows:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.google.caliper.worker.MicrobenchmarkAllocationWorker.measureAllocations(MicrobenchmarkAllocationWorker.java:66)
at com.google.caliper.worker.MicrobenchmarkAllocationWorker.bootstrap(MicrobenchmarkAllocationWorker.java:49)
at com.google.caliper.worker.WorkerMain.main(WorkerMain.java:55)
Caused by: java.lang.LinkageError: loader (instance of sun/misc/Launcher$AppClassLoader): attempted duplicate class definition for name: "com/google/common/collect/Lists$StringAsImmutableList"

What version of the product are you using? On what operating system?
Latest from git. Mac OS X 10.9.3, Java 8

```

Original issue reported on code.google.com by `kevinher...@gmail.com` on 25 May 2014 at 5:57