Problem with duplicate classpath entries

I'm having an issue with the "Reset Project Configuration" command which is 
either handing or returning the error "Could not reset project classpath".

I am unfortunately unable to share the code itself, but I tracked down the 
following in the logs:

!ENTRY ccw.core 4 0 2015-01-29 15:54:56.159
!MESSAGE Could not reset project classpath
!STACK 1
Java Model Exception: Java Model Status [Build path contains duplicate entry: 
'src/clj' for project 'patient-referrals']
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:785)
    at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3097)
    at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3059)
    at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:3112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
    at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
    at ccw.leiningen.nature$reset_project_build_path.invoke(nature.clj:144)
    at ccw.leiningen.handlers$upgrade_project_build_path$fn__5178.invoke(handlers.clj:177)
    at ccw.eclipse$workspace_job$fn__3842.invoke(eclipse.clj:511)
    at ccw.eclipse.proxy$org.eclipse.core.resources.WorkspaceJob$ff19274a.runInWorkspace(Unknown Source)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!SUBENTRY 1 org.eclipse.jdt.core 4 977 2015-01-29 15:54:56.159
!MESSAGE Build path contains duplicate entry: 'src/clj' for project 
'patient-referrals'

In the project.clj the src/clj source path was mentioned twice, once in 
":source-paths" and also in ":profiles / :dev / :source-paths". 

An effective workaround is to remove the duplicates in project.clj but I think 
that ideally CCW should be able to handle the case of a repeated identical 
:source-path entry, since Leiningen permits this.
Original issue reported on code.google.com by mike.r.anderson.13@gmail.com on 29 Jan 2015 at 8:31
shdqcdsn / counterclockwise

Problem with duplicate classpath entries #684
