From 0d5683525e0f4b12367ff5a2a09a0b4df7b66786 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Wed, 16 Sep 2026 03:42:29 -0500
Subject: [PATCH] [core] Use a user provided default constructor for
 DelayAction (#19137)

---
 esphome/core/base_automation.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/esphome/core/base_automation.h b/esphome/core/base_automation.h
index 276b8aa9728..999b38bd5cf 100644
--- a/esphome/core/base_automation.h
+++ b/esphome/core/base_automation.h
@@ -180,7 +180,9 @@ class ProjectUpdateTrigger : public Trigger<std::string>, public Component {
 
 template<typename... Ts> class DelayAction : public Action<Ts...> {
  public:
-  explicit DelayAction() = default;
+  // User provided, not "= default": `new(p) DelayAction()` would zero-fill .bss that is already zero.
+  // constexpr and noexcept keep the rest of the implicit constructor's contract.
+  constexpr explicit DelayAction() noexcept {}
 
   TEMPLATABLE_VALUE(uint32_t, delay)