From 21cac42385e1a116d287e155e461453b830640d2 Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@jeremyevans.net>
Date: Thu, 26 May 2022 10:37:01 -0700
Subject: Raise ArgumentError for IO.foreach with limit of 0

Makes behavior consistent with IO.readlines.

Fixes [Bug #18767]
---
 test/ruby/test_io.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 6a3d7594cf..d6fcf16ddd 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2602,6 +2602,8 @@ class TestIO < Test::Unit::TestCase
       bug = '[ruby-dev:31525]'
       assert_raise(ArgumentError, bug) {IO.foreach}
 
+      assert_raise(ArgumentError, "[Bug #18767] [ruby-core:108499]") {IO.foreach(__FILE__, 0){}}
+
       a = nil
       assert_nothing_raised(ArgumentError, bug) {a = IO.foreach(t.path).to_a}
       assert_equal(["foo\n", "bar\n", "baz\n"], a, bug)
-- 
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