From acbddbe68cdcf5506791d8e19c184536ba253b02 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Wed, 30 Jun 2021 21:04:56 +0900
Subject: [ruby/irb] Rescue a specific error

Rescuing StandardError is prone to bugs caused by a typo or obsoleted methods.

https://github.com/ruby/irb/commit/eb5260fcd5
---
 lib/irb/cmd/ls.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/irb/cmd/ls.rb b/lib/irb/cmd/ls.rb
index 9cbba50f10..18092642d7 100644
--- a/lib/irb/cmd/ls.rb
+++ b/lib/irb/cmd/ls.rb
@@ -24,7 +24,7 @@ module IRB
       end
 
       def dump_methods(o, klass, obj)
-        singleton_class = obj.singleton_class rescue nil
+        singleton_class = begin obj.singleton_class; rescue TypeError; nil end
         maps = class_method_map((singleton_class || klass).ancestors)
         maps.each do |mod, methods|
           name = mod == singleton_class ? "#{klass}.methods" : "#{mod}#methods"
-- 
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