From 49fd7d6041734e041aadfff521a5192085d2c636 Mon Sep 17 00:00:00 2001
From: Gabriel Lidenor <oxentestudios@gmail.com>
Date: Fri, 11 Sep 2026 19:15:38 -0500
Subject: [PATCH] fix: irb_require matches similar names

---
 lib/irb/command/load.rb  |  2 +-
 test/irb/test_command.rb | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/lib/irb/command/load.rb b/lib/irb/command/load.rb
index 1cd3f279d..36c6dbbad 100644
--- a/lib/irb/command/load.rb
+++ b/lib/irb/command/load.rb
@@ -45,7 +45,7 @@ def execute(arg)
       def execute_internal(file_name = nil)
         raise_cmd_argument_error unless file_name
 
-        rex = Regexp.new("#{Regexp.quote(file_name)}(\.o|\.rb)?")
+        rex = Regexp.new("\\A#{Regexp.escape(file_name)}(?:\\.o|\\.rb)?\\z")
         return false if $".find{|f| f =~ rex}
 
         case file_name
diff --git a/test/irb/test_command.rb b/test/irb/test_command.rb
index fd98a5a1b..5795a4457 100644
--- a/test/irb/test_command.rb
+++ b/test/irb/test_command.rb
@@ -458,6 +458,21 @@ def test_irb_load_without_argument
       assert_empty err
       assert_match(/Please specify the file name./, out)
     end
+
+    def test_irb_require_file_matches_exact_name
+      File.write("#{@tmpdir}/foo.rb", "'foo_loaded'\n")
+      File.write("#{@tmpdir}/foo2.rb", "'foo2_loaded'\n")
+
+      out, err = execute_lines(
+        "$LOAD_PATH.unshift '#{@tmpdir}'\n",
+        "irb_require 'foo'\n",
+        "irb_require 'foo2'\n",
+      )
+
+      assert_empty(err)
+      assert_match(/foo_loaded/, out)
+      assert_match(/foo2_loaded/, out)
+    end
   end
 
   class WorkspaceCommandTestCase < CommandTestCase