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pack-objects: Fix segfault when object count is less than thread count
When partitioning the work amongst threads, dividing the number of objects by the number of threads may return 0 when there are less objects than threads; this will cause the subsequent code to segfault when accessing list[sub_size-1]. Allow some threads to have zero objects to work on instead of barfing, while letting others to have more. Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -1672,7 +1672,8 @@ static void ll_find_deltas(struct object_entry **list, unsigned list_size,
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p[i].data_ready = 0;
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/* try to split chunks on "path" boundaries */
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while (sub_size < list_size && list[sub_size]->hash &&
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while (sub_size && sub_size < list_size &&
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list[sub_size]->hash &&
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list[sub_size]->hash == list[sub_size-1]->hash)
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sub_size++;
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