DEBUG_LEVEL=0 build is broken ?!

I have the main tree at commit: 6f9d826

If I run below command:
DEBUG_LEVEL=0 make -j48 db_bench

compilation fails with following error:

=======================

In file included from memtable/wbwi_memtable.cc:6:
./memtable/wbwi_memtable.h: In member function ‘void rocksdb::WBWIMemTableIterator::UpdateKey()’:
./memtable/wbwi_memtable.h:127:49: error: array subscript 0 is outside array bounds of ‘std::aligned_storage<8, 4>::type [0]’ [-Werror=array-bounds=]
127 | std::to_string(t->second));
| ~~~^~~~~~
cc1plus: note: source object is likely at address zero

======================

Looks like it is complaining because we are trying to access t->second after verifying that
t == WriteTypeToValueTypeMap.end(). (Basically t has reached end, at this point)

This seems to be introduced from below commit.

=========================
commit id: 1c7652f
Author: Changyu Bi changyubi@meta.com
Date: Tue Nov 12 09:27:11 2024 -0800

Introduce a WriteBatchWithIndex-based implementation of ReadOnlyMemTable (#13123)

Summary:
introduce the class WBWIMemTable that implements ReadOnlyMemTable interface with data stored in a WriteBatchWithIndex object.

========================

However, compilation does not fail if DEBUG_LEVEL=1.

The following change fixes the compilation error.

$ git diff
diff --git a/memtable/wbwi_memtable.h b/memtable/wbwi_memtable.h
index 1daf5d779..b48abf993 100644
--- a/memtable/wbwi_memtable.h
+++ b/memtable/wbwi_memtable.h
@@ -122,8 +122,7 @@ class WBWIMemTableIterator final : public InternalIterator {
     if (t == WriteTypeToValueTypeMap.end()) {
       key_.clear();
       valid_ = false;
-      s_ = Status::Corruption("Unexpected write_batch_with_index entry type " +
-                              std::to_string(t->second));
+      s_ = Status::Corruption("Unexpected write_batch_with_index entry type.");
       return;
     }
     key_buf_.SetInternalKey(it_->Entry().key, global_seqno_, t->second);

I can send a PR if above change is acceptable.

Although I am a little bit surprised that the nightly builds haven't caught this. Or please let me know if I am missing something here.

Expected behavior: Build should pass

Actual behavior: Build fails (DEBUG_LEVEL=0)

Steps to reproduce the behavior: Run "DEBUG_LEVEL=0 make -j48 db_bench"