Index: lib/sanitizer_common/sanitizer_allocator_local_cache.h
===================================================================
--- lib/sanitizer_common/sanitizer_allocator_local_cache.h
+++ lib/sanitizer_common/sanitizer_allocator_local_cache.h
@@ -262,8 +262,7 @@
     // TODO(alekseys): Figure out how to do it without allocating a new batch.
     if (UNLIKELY(!b))
       DieOnFailure::OnOOM();
-    b->SetFromArray(allocator->GetRegionBeginBySizeClass(class_id),
-                    &c->batch[first_idx_to_drain], count);
+    b->SetFromArray(&c->batch[first_idx_to_drain], count);
     c->count -= count;
     allocator->DeallocateBatch(&stats_, class_id, b);
   }
Index: lib/sanitizer_common/sanitizer_allocator_primary32.h
===================================================================
--- lib/sanitizer_common/sanitizer_allocator_primary32.h
+++ lib/sanitizer_common/sanitizer_allocator_primary32.h
@@ -63,7 +63,7 @@
 
   struct TransferBatch {
     static const uptr kMaxNumCached = SizeClassMap::kMaxNumCachedHint - 2;
-    void SetFromArray(uptr region_beg_unused, void *batch[], uptr count) {
+    void SetFromArray(void *batch[], uptr count) {
       count_ = count;
       CHECK_LE(count_, kMaxNumCached);
       for (uptr i = 0; i < count; i++)