From c61dee4b62f05463c21bdd7951621c2bee0f0886 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bar=C4=B1=C5=9F=20Soner=20U=C5=9Fakl=C4=B1?=
 <barisusakli@gmail.com>
Date: Thu, 5 Nov 2020 21:01:19 -0500
Subject: [PATCH] fix: #8840, don't crash if /compose route is called with no
 query params

---
 src/controllers/composer.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/controllers/composer.js b/src/controllers/composer.js
index 36dd1fac40..5d9e3a3260 100644
--- a/src/controllers/composer.js
+++ b/src/controllers/composer.js
@@ -22,6 +22,9 @@ exports.get = async function (req, res, callback) {
 		templateData: {},
 	});
 
+	if (res.headersSent) {
+		return;
+	}
 	if (!data || !data.templateData) {
 		return callback(new Error('[[error:invalid-data]]'));
 	}