https://git.ruby-lang.org/ruby.git/commit/?id=21cac42385

From 21cac42385e1a116d287e155e461453b830640d2 Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@j...>
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]
---
 io.c                 | 2 ++
 test/ruby/test_io.rb | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/io.c b/io.c
index f2c64989df..1eb48dd19b 100644
--- a/io.c
+++ b/io.c
@@ -11518,6 +11518,8 @@ io_s_foreach(VALUE v) https://github.com/ruby/ruby/blob/trunk/io.c#L11518
     struct getline_arg *arg = (void *)v;
     VALUE str;
 
+    if (arg->limit == 0)
+        rb_raise(rb_eArgError, "invalid limit: 0 for foreach");
     while (!NIL_P(str = rb_io_getline_1(arg->rs, arg->limit, arg->chomp, arg->io))) {
         rb_lastline_set(str);
         rb_yield(str);
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 https://github.com/ruby/ruby/blob/trunk/test/ruby/test_io.rb#L2602
       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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