From 084790809f970fce31b61a2a3b4f1a711557d357 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 18 Mar 2026 21:26:20 -1000
Subject: [PATCH] [combination] Add safety comment for [&source] capture
 lifetime

---
 esphome/components/combination/combination.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/esphome/components/combination/combination.cpp b/esphome/components/combination/combination.cpp
index 27d6af1346b..b858eee4ee4 100644
--- a/esphome/components/combination/combination.cpp
+++ b/esphome/components/combination/combination.cpp
@@ -60,6 +60,8 @@ void KalmanCombinationComponent::dump_config() {
 
 void KalmanCombinationComponent::setup() {
   for (auto &source : this->sensor_sources_) {
+    // [&source] is safe: source refers to a FixedVector element that never reallocates,
+    // so the reference remains valid for the component's lifetime.
     source.sensor->add_on_state_callback([&source](float x) -> void {
       static_cast<KalmanCombinationComponent *>(source.parent)->correct_(x, source.compute(x));
     });