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Callers don't actually see -1 (they'll usually see 255, but the exact answer here is complicated). Just switch to 1 as that's the standard value tools use to indicate an error. Change-Id: Ib712db1924bc3e5f7920bafd7bb5fb61f3bda44f Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/233553 Reviewed-by: David Pursehouse <dpursehouse@collab.net> Tested-by: Mike Frysinger <vapier@google.com>