[1.9.x] Fixed #26603 -- Forced lazy template names to text when computing cache key.

Refs #26536.

Thanks Sylvain Fankhauser for the very detailed report.

Backport of 207c5b4acd410dd39bac31457dae26a0d15b8b93 from master

1 files changed, 2 insertions, 2 deletions

diff --git a/django/template/loaders/cached.py b/django/template/loaders/cached.py
index 1a3851d280..104a3356a7 100644
--- a/django/template/loaders/cached.py
+++ b/django/template/loaders/cached.py
@@ -9,7 +9,7 @@ import warnings
 from django.template import Origin, Template, TemplateDoesNotExist
 from django.template.backends.django import copy_exception
 from django.utils.deprecation import RemovedInDjango20Warning
-from django.utils.encoding import force_bytes
+from django.utils.encoding import force_bytes, force_text
 from django.utils.inspect import func_supports_parameter
 
 from .base import Loader as BaseLoader
@@ -100,7 +100,7 @@ class Loader(BaseLoader):
         if template_dirs:
             dirs_prefix = self.generate_hash(template_dirs)
 
-        return '-'.join(filter(bool, [template_name, skip_prefix, dirs_prefix]))
+        return '-'.join(filter(bool, [force_text(template_name), skip_prefix, dirs_prefix]))
 
     def generate_hash(self, values):
         return hashlib.sha1(force_bytes('|'.join(values))).hexdigest()