rev-list: detect broken root trees
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>
diff --git a/list-objects.c b/list-objects.c
index bb7e61e..b5651dd 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -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);
diff --git a/t/t6102-rev-list-unexpected-objects.sh b/t/t6102-rev-list-unexpected-objects.sh
index 28ee1bc..28611c9 100755
--- a/t/t6102-rev-list-unexpected-objects.sh
+++ b/t/t6102-rev-list-unexpected-objects.sh
@@ -67,8 +67,10 @@
test_must_fail git rev-list --objects $broken_commit
'
-test_expect_failure 'traverse unexpected non-tree root (seen)' '
- test_must_fail git rev-list --objects $blob $broken_commit
+test_expect_success 'traverse unexpected non-tree root (seen)' '
+ test_must_fail git rev-list --objects $blob $broken_commit \
+ >output 2>&1 &&
+ test_i18ngrep "not a tree" output
'
test_expect_success 'setup unexpected non-commit tag' '
