Problem report from Kathey Marsden:
There seems to be some sort of problem with the sanity state.
After ant clobber, rm -rf jars, rm -rf snapshot no apparent problematic
files, ant -Dsane=false snapshot seemed to sometimes build the jars to
the sane jar directory and yield the following error.
[delete] Deleting directory D:\svn\opensource\10.1\javadoc\sourcedir
[mkdir] Created dir: D:\svn\opensource\10.1\snapshot
D:\svn\opensource\10.1\jars\insane not found.
A reliable workaround was to run
before ant -Dsane=false snapshot.