From 0f499927184e3199c20c9c48a58ac257292af680 Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Wed, 5 Apr 2023 01:47:54 +0800
Subject: [PATCH] cabana: do not emit DBCFileChanged if no file changes
 (#27800)

old-commit-hash: 493d20994a1a4e41c11c33b73550a0d120a2bdb8
---
 tools/cabana/dbc/dbcmanager.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/cabana/dbc/dbcmanager.cc b/tools/cabana/dbc/dbcmanager.cc
index 49527765a8..24803a303f 100644
--- a/tools/cabana/dbc/dbcmanager.cc
+++ b/tools/cabana/dbc/dbcmanager.cc
@@ -59,6 +59,8 @@ bool DBCManager::open(SourceSet s, const QString &name, const QString &content,
 }
 
 void DBCManager::closeAll() {
+  if (dbc_files.isEmpty()) return;
+
   while (dbc_files.size()) {
     DBCFile *dbc_file = dbc_files.back().second;
     dbc_files.pop_back();