Re: [PATCH v6 02/15] reftable: fix resource leak in block.c error path

From: Han-Wen Nienhuys <redacted>

Add test coverage for corrupt zlib data. Fix memory leaks demonstrated by
unittest.

This problem was discovered by a Coverity scan.

Signed-off-by: Han-Wen Nienhuys <redacted>
---
 reftable/block.c          | 26 +++++++++------
 reftable/reader.c         | 23 ++++++++------
 reftable/readwrite_test.c | 66 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+), 18 deletions(-)

diff --git a/reftable/block.c b/reftable/block.c
index 855e3f5c947..6c8e8705205 100644
--- a/reftable/block.c
+++ b/reftable/block.c

@@ -188,13 +188,16 @@ int block_reader_init(struct block_reader *br, struct reftable_block *block,
 	uint32_t full_block_size = table_block_size;
 	uint8_t typ = block->data[header_off];
 	uint32_t sz = get_be24(block->data + header_off + 1);
-