From 4b7f3355ea50be226bffa0f00a3a3ce41c6d399b Mon Sep 17 00:00:00 2001
From: Clyde Stubbs <2366188+clydebarrow@users.noreply.github.com>
Date: Thu, 31 Jul 2025 08:56:43 +1000
Subject: [PATCH] [core] Fix regex for lambda id() replacement (#9975)

---
 esphome/core/__init__.py          | 2 +-
 tests/components/host/common.yaml | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/esphome/core/__init__.py b/esphome/core/__init__.py
index 472067797e..39c6c3def1 100644
--- a/esphome/core/__init__.py
+++ b/esphome/core/__init__.py
@@ -263,7 +263,7 @@ class TimePeriodMinutes(TimePeriod):
     pass
 
 
-LAMBDA_PROG = re.compile(r"id\(\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*\)(\.?)")
+LAMBDA_PROG = re.compile(r"\bid\(\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*\)(\.?)")
 
 
 class Lambda:
diff --git a/tests/components/host/common.yaml b/tests/components/host/common.yaml
index fca0c5d597..5c329c8245 100644
--- a/tests/components/host/common.yaml
+++ b/tests/components/host/common.yaml
@@ -8,3 +8,10 @@ logger:
 
 host:
   mac_address: "62:23:45:AF:B3:DD"
+
+esphome:
+  on_boot:
+    - lambda: |-
+        static const uint8_t my_addr[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+        if (!mac_address_is_valid(my_addr))
+          ESP_LOGD("test", "Invalid mac address %X", my_addr[0]); // etc.