From 939def75f3f57179aef79a60eacb4b035faaa5ba Mon Sep 17 00:00:00 2001
From: Sylvestre Ledru <sylvestre@debian.org>
Date: Thu, 19 Mar 2026 22:25:14 +0100
Subject: [PATCH] tests: tr: add test for invalid character class name

* tests/tr/tr.pl (invalid-class): New test.
Identified : https://github.com/uutils/coreutils/pull/11398
https://github.com/coreutils/coreutils/pull/225
---
 tests/tr/tr.pl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/tr/tr.pl b/tests/tr/tr.pl
index e07dfa0c7..dc37e5c19 100755
--- a/tests/tr/tr.pl
+++ b/tests/tr/tr.pl
@@ -158,6 +158,10 @@ my @Tests =
 
   # Up to coreutils-6.9, this would provoke a failed assertion.
   ['no-abort-1', qw(-c a '[b*256]'), {IN=>'abc'}, {OUT=>'abb'}],
+
+  # Reject unknown character class name.
+  ['invalid-class', qw('[:fooclass:]' x), {IN=>'abc'}, {OUT=>''}, {EXIT=>1},
+   {ERR=>"$prog: invalid character class 'fooclass'\n"}],
 );
 
 @Tests = triple_test \@Tests;