From 875da7f061bf141aa6bf2c34afad1cf16d179e17 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 5 Nov 2021 05:01:31 -0400 Subject: [PATCH] test_bitmap_hashes(): handle repository without bitmaps 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 Signed-off-by: Junio C Hamano --- pack-bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pack-bitmap.c b/pack-bitmap.c index f47a0a7db4..b37a3c0743 100644 --- a/pack-bitmap.c +++ b/pack-bitmap.c @@ -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++) {