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rev-list: detect broken root trees

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When the traversal machinery sees a commit without a root tree, it
assumes that the tree was part of a BOUNDARY commit, and quietly ignores
the tree. But it could also be caused by a commit whose root tree is
broken or missing.

Instead, let's die() when we see a NULL root tree. We can differentiate
it from the BOUNDARY case by seeing if the commit was actually parsed.
This covers that case, plus future-proofs us against any others where we
might try to show an unparsed commit.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2019-04-09 19:13:25 -07:00
committed by Junio C Hamano
parent ee4dfee227
commit 97dd512af7
2 changed files with 7 additions and 2 deletions
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3
list-objects.c
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@ -374,6 +374,9 @@ static void do_traverse(struct traversal_context *ctx)
struct tree *tree = get_commit_tree(commit);
tree->object.flags |= NOT_USER_GIVEN;
add_pending_tree(ctx->revs, tree);
} else if (commit->object.parsed) {
die(_("unable to load root tree for commit %s"),
oid_to_hex(&commit->object.oid));
}
ctx->show_commit(commit, ctx->show_data);