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commit-graph: prepare commit graph

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Before checking if the repository has a commit-graph loaded, be sure
to run prepare_commit_graph(). This is necessary because otherwise
the topo_levels slab is not initialized. As we compute topo_levels for
the new commits, we iterate further into the lower layers since the
first visit to each commit looks as though the topo_level is not
populated.

By properly initializing the topo_slab, we fix the previously broken
case of a split commit graph where a base layer has the
generation_data_overflow chunk.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2021-02-02 03:01:23 +00:00
committed by Junio C Hamano
parent fde55b0906
commit bc50d6c91f
2 changed files with 3 additions and 9 deletions
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2
t/t5318-commit-graph.sh
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@ -446,7 +446,7 @@ test_expect_success 'warn on improper hash version' '
)
'
test_expect_failure 'lower layers have overflow chunk' '
test_expect_success 'lower layers have overflow chunk' '
cd "$TRASH_DIRECTORY/full" &&
UNIX_EPOCH_ZERO="@0 +0000" &&
FUTURE_DATE="@2147483646 +0000" &&