https://git.ruby-lang.org/ruby.git/commit/?id=3fb1f411ed

From 3fb1f411ed8dcae693c2e9bdb68f4e9815cbb5f1 Mon Sep 17 00:00:00 2001
From: st0012 <stan001212@g...>
Date: Mon, 17 Jan 2022 15:17:18 +0000
Subject: [ruby/irb] require_relative can't be used for default gems' exe files

The `exe` folder and `lib` folder of default gems don't locate under the
same place. While `exe/irb` will be under the gem folder, `irb.rb` will be
under `lib/ruby/VERSION/`.

So `require_relative` will make `irb` unuseable when shipped with Ruby.

Related discussion in the comments: https://github.com/ruby/irb/pull/335

https://github.com/ruby/irb/commit/99d3aa979d
---
 libexec/irb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libexec/irb b/libexec/irb
index ffc97867d0d..c64ee85fbdc 100755
--- a/libexec/irb
+++ b/libexec/irb
@@ -6,6 +6,6 @@ https://github.com/ruby/ruby/blob/trunk/libexec/irb#L6
 #   	by Keiju ISHITSUKA(keiju@r...)
 #
 
-require_relative '../lib/irb'
+require "irb"
 
 IRB.start(__FILE__)
-- 
cgit v1.2.1


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