From 21eb59e7e4466c151ca4d20f6e9f852d9d40cb59 Mon Sep 17 00:00:00 2001
From: Pradip-Garai <pradipgarai173@gmail.com>
Date: Sun, 12 Jul 2026 11:48:56 +0530
Subject: [PATCH] fix(view): handle view names ending with a dot

Avoid calling require("") with an empty string when the resolved extension
is a single dot (e.g., "index."). This prevents an opaque TypeError and
correctly falls back to resolving the view or yielding a clean lookup error.

Also adds an automated regression test in test/app.render.js.
---
 lib/view.js        |  4 ++++
 test/app.render.js | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/lib/view.js b/lib/view.js
index d66b4a2d89c..10d2976f7be 100644
--- a/lib/view.js
+++ b/lib/view.js
@@ -55,6 +55,10 @@ function View(name, options) {
   this.defaultEngine = opts.defaultEngine;
   this.ext = extname(name);
   this.name = name;
+
+  if (this.ext === '.') {
+    this.ext = '';
+  }
   this.root = opts.root;
 
   if (!this.ext && !this.defaultEngine) {
diff --git a/test/app.render.js b/test/app.render.js
index bd65ce1035b..7b6724d2994 100644
--- a/test/app.render.js
+++ b/test/app.render.js
@@ -90,6 +90,18 @@ describe('app', function(){
           done();
         });
       })
+
+      it('should provide a helpful error when view name ends with a dot', function(done){
+        var app = createApp();
+        app.set('view engine', 'tmpl');
+
+        app.set('views', path.join(__dirname, 'fixtures'))
+        app.render('rawr.', function (err) {
+          assert.ok(err)
+          assert.equal(err.message, 'Failed to lookup view "rawr." in views directory "' + path.join(__dirname, 'fixtures') + '"')
+          done();
+        });
+      })
     })
 
     describe('when an error occurs', function(){