https://jira.mongodb.org/browse/SERVER-97048

From ce43ef7147fabfa5b7f14a3040a0fc19b9228d9f Mon Sep 17 00:00:00 2001
From: James Bronsted <32047428+jpbronsted@users.noreply.github.com>
Date: Wed, 27 Nov 2024 17:59:39 -0500
Subject: [PATCH] SERVER-97048 fix compile error on Clang 19 due to
 BSONColumnBuilder default constructor (#29231)

GitOrigin-RevId: 82d5ad449944292fe4cfdb7a27886439725d58de

diff --git a/src/mongo/bson/util/bsoncolumnbuilder.h b/src/mongo/bson/util/bsoncolumnbuilder.h
index d9cd20e07b7..b7d36fa1b28 100644
--- a/src/mongo/bson/util/bsoncolumnbuilder.h
+++ b/src/mongo/bson/util/bsoncolumnbuilder.h
@@ -282,7 +282,9 @@ struct EncodingState {
 template <class Allocator = std::allocator<void>>
 class BSONColumnBuilder {
 public:
-    explicit BSONColumnBuilder(const Allocator& = {});
+    template <typename A = Allocator>
+    BSONColumnBuilder() : BSONColumnBuilder{A{}} {}
+    explicit BSONColumnBuilder(const Allocator&);
     explicit BSONColumnBuilder(allocator_aware::BufBuilder<Allocator>, const Allocator& = {});
 
     /**
-- 
2.49.1