Comment 3 for bug 1305244

So having gone through this, pivot_root is working as expected and the test suite does pass with some minor alterations to fix a few problems with the profiles it was generating.

There is a bug in how the parser is handling the rules, and I am working on a patch for that. Until that patch lands please be very careful with '/' and variable expansion and remember the roots being pivoted in are directories and must end with '/'

eg.
   pivot_root old_root=/foo /bar,

will fail because neither /foo nor /bar are directories, the correct rule is
  pivot_root old_root/foo/ /bar/,

Check variable expansions as they can result in invalid paths that are not properly handled atm.
  @{foo} = /foo/
  pivot_root @{foo}/bar/,

this is resulting in the post variable expansion rule that looks like
  pivot_root /foo//bar/,

which will always fail to match