From a89a4e13536acafeae31566b7e9c402f2af4dd37 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sun, 5 Apr 2026 11:59:02 -1000
Subject: [PATCH] Always log EXCVADDR for exception resets

A null EXCVADDR (0x00000000) is the key diagnostic for null pointer
crashes (LoadProhibited/StoreProhibited). Suppressing it when zero
hides the most useful information.
---
 esphome/components/esp8266/crash_handler.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esphome/components/esp8266/crash_handler.cpp b/esphome/components/esp8266/crash_handler.cpp
index 5aeb6f6f2d..9ffe0ff021 100644
--- a/esphome/components/esp8266/crash_handler.cpp
+++ b/esphome/components/esp8266/crash_handler.cpp
@@ -194,7 +194,8 @@ void crash_handler_log() {
   if (resetInfo.epc3 != 0) {
     ESP_LOGE(TAG, "  EPC3: 0x%08" PRIX32, resetInfo.epc3);
   }
-  if (resetInfo.excvaddr != 0) {
+  if (resetInfo.reason == REASON_EXCEPTION_RST) {
+    // Always log EXCVADDR for exceptions — 0x00000000 IS the diagnostic for null pointer crashes
     ESP_LOGE(TAG, "  EXCVADDR: 0x%08" PRIX32 "  (faulting address)", resetInfo.excvaddr);
   }
   if (resetInfo.depc != 0) {