clone: add try/finally to unwrap While fixing other test failures, I saw stack overflows related to the clone function being wrapped too many times. I believe it's because this wrapping logic doesn't put the unwrap logic in a finally statement. This particularly bad in the tests, which do many things in one process. Hence the stack overflow.

#!/bin/sh
. $(dirname $0)/common.sh

for b in `hg branches -aq` ; do
    hg co $b || break
    echo verifying $b
    hg svn verify
done