Subject: git replace --graft does error checking too late

From: Andreas Schwab <[email-masked]>
Date: Wed, 27 Mar 2019 11:22:40 +0100

When running `git replace --graft A B' where B is a non-commit (eg. a
tag) it displays an error, but creates the replace ref anyway.  I think
it should verify that B names a commit object before creating the ref.

Andreas.

-- 
Andreas Schwab, SUSE Labs, [email-masked]
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