Subject: [PATCH][next] hook: check for NULL pointer before deref

From: Adrian Ratiu <[email-masked]>
Date: Fri, 9 Jan 2026 17:35:28 +0200

Fix a compiler warning (-Werror=analyzer-deref-before-check) due to
dereferencing the options pointer before NULL checking it.

In practice run_hooks_opt() is never called with a NULL opt struct,
so this just fixes the code to not trigger the warning anymore.

The NULL check is kept as-is because some future patches might end up
calling run_hooks_opt with a NULL opt struct, which is clearly a bug.

While at it, also fix the BUG message function name.

Reported-by: correctmost <[email-masked]>
Suggested-by: Patrick Steinhardt <[email-masked]>
Signed-off-by: Adrian Ratiu <[email-masked]>
---
This is based on next, because it fixes a warning introduced in next.
Succesful CI run: https://github.com/10ne1/git/actions/runs/20855922803
---
 hook.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hook.c b/hook.c
index 35211e5ed7..c257bd3940 100644
--- a/hook.c
+++ b/hook.c
@@ -148,12 +148,11 @@ int run_hooks_opt(struct repository *r, const char *hook_name,
 	};
 	const char *const hook_path = find_hook(r, hook_name);
 	int ret = 0;
-	const struct run_process_parallel_opts opts = {
+	struct run_process_parallel_opts opts = {
 		.tr2_category = "hook",
 		.tr2_label = hook_name,
 
 		.processes = 1,
-		.ungroup = options->ungroup,
 
 		.get_next_task = pick_next_hook,
 		.start_failure = notify_start_failure,
@@ -165,11 +164,13 @@ int run_hooks_opt(struct repository *r, const char *hook_name,
 	};
 
 	if (!options)
-		BUG("a struct run_hooks_opt must be provided to run_hooks");
+		BUG("a struct run_hooks_opt must be provided to run_hooks_opt");
 
 	if (options->path_to_stdin && options->feed_pipe)
 		BUG("options path_to_stdin and feed_pipe are mutually exclusive");
 
+	opts.ungroup = options->ungroup;
+
 	if (options->invoked_hook)
 		*options->invoked_hook = 0;
 
-- 
2.51.2