refs: dereference the value of the required pointer #2130
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Currently, this always prints yes because required is non-null. This is the wrong behavior. The boolean must be dereferenced. Signed-off-by: Greg Funni <[email protected]>
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On the Git mailing list, Junio C Hamano wrote (reply to this): "AZero13 via GitGitGadget" <[email protected]> writes:
> From: Greg Funni <[email protected]>
>
> Currently, this always prints yes because required is non-null.
>
> This is the wrong behavior. The boolean must be
> dereferenced.
The line is blamed to f6c5ca38 (refs: add a `optimize_required`
field to `struct ref_storage_be`, 2025-11-08); the author CC'ed for
an Ack.
Thanks.
>
> Signed-off-by: Greg Funni <[email protected]>
> ---
> refs: dereference the value of the required pointer
>
> Currently, this always prints yes because required is non-null.
>
> This is the wrong behavior. The boolean must be dereferenced.
>
> Signed-off-by: Greg Funni [email protected]
>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-2130%2FAZero13%2Fref-cache-v1
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-2130/AZero13/ref-cache-v1
> Pull-Request: https://github.com/git/git/pull/2130
>
> refs/debug.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/refs/debug.c b/refs/debug.c
> index 3e31228c9a..639db0f26e 100644
> --- a/refs/debug.c
> +++ b/refs/debug.c
> @@ -139,7 +139,7 @@ static int debug_optimize_required(struct ref_store *ref_store,
> struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
> int res = drefs->refs->be->optimize_required(drefs->refs, opts, required);
> trace_printf_key(&trace_refs, "optimize_required: %s, res: %d\n",
> - required ? "yes" : "no", res);
> + *required ? "yes" : "no", res);
> return res;
> }
>
>
> base-commit: c4a0c8845e2426375ad257b6c221a3a7d92ecfda |
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On the Git mailing list, Patrick Steinhardt wrote (reply to this): On Thu, Dec 18, 2025 at 04:10:49PM +0000, AZero13 via GitGitGadget wrote:
> diff --git a/refs/debug.c b/refs/debug.c
> index 3e31228c9a..639db0f26e 100644
> --- a/refs/debug.c
> +++ b/refs/debug.c
> @@ -139,7 +139,7 @@ static int debug_optimize_required(struct ref_store *ref_store,
> struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
> int res = drefs->refs->be->optimize_required(drefs->refs, opts, required);
> trace_printf_key(&trace_refs, "optimize_required: %s, res: %d\n",
> - required ? "yes" : "no", res);
> + *required ? "yes" : "no", res);
> return res;
> }
Makes sense. One question is whether `required` will always be non-NULL
so that we can unconditionally dereference the pointer like this. But
from going through the implementations I can see that the pointer
already does get dereferenced unconditionally, so this fix is safe.
Thanks!
Patrick |
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Currently, this always prints yes because required is non-null.
This is the wrong behavior. The boolean must be
dereferenced.
Signed-off-by: Greg Funni [email protected]
cc: Patrick Steinhardt [email protected]