From d3e569ea57fab877c9e2b9036c13100828c1e4b3 Mon Sep 17 00:00:00 2001
From: Ivan Fefer <ivan.fefer@mongodb.com>
Date: Mon, 10 Oct 2022 15:28:38 +0000
Subject: SERVER-70394 Fix self-swap in MultiPlanStage::removeRejectedPlans

(cherry picked from commit df498b17710f364a853c4dc1731cbdc6ec91e0f5)
---
 src/mongo/db/exec/multi_plan.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mongo/db/exec/multi_plan.cpp b/src/mongo/db/exec/multi_plan.cpp
index 8c816ebdcbd..00254cef133 100644
--- a/src/mongo/db/exec/multi_plan.cpp
+++ b/src/mongo/db/exec/multi_plan.cpp
@@ -376,7 +376,7 @@ void MultiPlanStage::removeRejectedPlans() {
     }
     size_t startIndex = 1;
     if (_backupPlanIdx != kNoSuchPlan) {
-        if (_bestPlanIdx != 1) {
+        if (_backupPlanIdx != 1) {
             std::swap(_children[_backupPlanIdx], _children[1]);
             std::swap(_candidates[_backupPlanIdx], _candidates[1]);
             _backupPlanIdx = 1;
-- 
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