The current code propagates all errors up to the iteration step meaning
that a single malformed repo will prevent GC of other repos.
This PR simply stops that propagation.
Fix#21605
Signed-off-by: Andrew Thornton <art27@cantab.net>
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>