Merge branch 'jk/index-pack-lsan-false-positive-fix' into maint-2.43

Fix false positive reported by leak sanitizer.

* jk/index-pack-lsan-false-positive-fix:
  index-pack: spawn threads atomically

Author: gitster

builtin/index-pack.c

@@ -1255,13 +1255,15 @@ static void resolve_deltas(void)
 	base_cache_limit = delta_base_cache_limit * nr_threads;
 	if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
 		init_thread();
+		work_lock();
 		for (i = 0; i < nr_threads; i++) {
 			int ret = pthread_create(&thread_data[i].thread, NULL,
 						 threaded_second_pass, thread_data + i);
 			if (ret)
 				die(_("unable to create thread: %s"),
 				    strerror(ret));
 		}
+		work_unlock();
 		for (i = 0; i < nr_threads; i++)
 			pthread_join(thread_data[i].thread, NULL);
 		cleanup_thread();