From 959519e8c109b88e01d18a36384cab82f7a5d21e Mon Sep 17 00:00:00 2001
From: Petro Vashchuk <stalkernoid@gmail.com>
Date: Mon, 17 Jan 2022 16:38:53 +0200
Subject: [PATCH] Bug 29684: add honeypot to catch other warnings in the future

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
---
 C4/Templates.pm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/C4/Templates.pm b/C4/Templates.pm
index d41c9b534e..53e1dc5073 100644
--- a/C4/Templates.pm
+++ b/C4/Templates.pm
@@ -113,6 +113,12 @@ sub output {
     $vars->{opaclayoutstylesheet} =
         C4::Context->preference('opaclayoutstylesheet');
 
+    if(exists $self->{VARS}{lang}) {
+        warn "Preventing \$template->lang='" . ($self->{vars}{lang}//'-undef-')
+            . "' to be overwritten by template->{VARS}{lang}='" . ($self->{VARS}{lang}//'-undef-') . "'";
+        delete $self->{VARS}{lang};
+    }
+
     # add variables set via param to $vars for processing
     $vars = { %$vars, %{ $self->{VARS} } };
 
-- 
2.39.5