Re: [PATCH/RFC 0/3] pedantic errors in next

["Carlo Marcelo Arenas Belón" <carenas@gmail.com>]

Thanks,

in the discussion above René[1] proposed a fix for UBsan issues that were
reported and that it is still missing.

my version of it didn't require the extra 4 bytes or showed issues with
notes so is probably incomplete and should be replaced from the original
if possible, but follows below:

Carlo

[1] https://lore.kernel.org/git/bab9f889-ee2e-d3c3-0319-e297b59261a0@web.de/

+CC René for advise 
--- >8 ---
Date: Sun, 8 Aug 2021 20:45:56 -0700
Subject: [PATCH] build: fixes for SANITIZE=undefined (WIP)
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mostly from instructions/code provided by René in :

  https://lore.kernel.org/git/20210807224957.GA5068@dcvr/

tested with Xcode in macOS 11.5.1 (x86_64)
---
 hash.h        | 2 +-
 object-file.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hash.h b/hash.h
index 27a180248f..3127ba1ef8 100644
--- a/hash.h
+++ b/hash.h
@@ -115,7 +115,7 @@ static inline void git_SHA256_Clone(git_SHA256_CTX *dst, const git_SHA256_CTX *s
 
 struct object_id {
 	unsigned char hash[GIT_MAX_RAWSZ];
-	int algo;
+	uint8_t algo;
 };
 
 /* A suitably aligned type for stack allocations of hash contexts. */
diff --git a/object-file.c b/object-file.c
index 374f3c26bf..2fa282a9b4 100644
--- a/object-file.c
+++ b/object-file.c
@@ -2406,7 +2406,7 @@ struct oidtree *odb_loose_cache(struct object_directory *odb,
 	struct strbuf buf = STRBUF_INIT;
 	size_t word_bits = bitsizeof(odb->loose_objects_subdir_seen[0]);
 	size_t word_index = subdir_nr / word_bits;
-	size_t mask = 1 << (subdir_nr % word_bits);
+	size_t mask = 1U << (subdir_nr % word_bits);
 	uint32_t *bitmap;
 
 	if (subdir_nr < 0 ||
-- 
2.33.0.rc1.379.g2890ef5eb6