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test_bitmap_hashes(): handle repository without bitmaps

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If prepare_bitmap_git() returns NULL (one easy-to-trigger cause being
that the repository does not have bitmaps at all), then we'll segfault
accessing bitmap_git->hashes:

  $ t/helper/test-tool bitmap dump-hashes
  Segmentation fault

We should treat this the same as a repository with bitmaps but no
name-hashes, and quietly produce an empty output. The later call to
free_bitmap_index() in the cleanup label is OK, as it treats a NULL
pointer as a noop.

This isn't a big deal in practice, as this function is intended for and
used only by test-tool. It's probably worth fixing to avoid confusion,
but not worth adding coverage for this to the test suite.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2021-11-05 05:01:31 -04:00 committed by Junio C Hamano
parent 88d915a634
commit 875da7f061
1 changed files with 1 additions and 1 deletions
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2
pack-bitmap.c
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@ -1748,7 +1748,7 @@ int test_bitmap_hashes(struct repository *r)
struct object_id oid;
uint32_t i, index_pos;
if (!bitmap_git->hashes)
if (!bitmap_git || !bitmap_git->hashes)
goto cleanup;
for (i = 0; i < bitmap_num_objects(bitmap_git); i++) {