From b97e909ef476a6facbaec665a205fee486371044 Mon Sep 17 00:00:00 2001
From: st0012 <stan001212@gmail.com>
Date: Sun, 2 Oct 2022 10:20:26 +0100
Subject: [ruby/irb] Remove unnecessary Thread presence check

They were introduced around 20 years ago, when Thread is not yet
stabilized. So we don't need them anymore.

https://github.com/ruby/irb/commit/4c75e03b2b
---
 lib/irb.rb               | 6 +-----
 lib/irb/context.rb       | 2 +-
 lib/irb/ext/multi-irb.rb | 1 -
 3 files changed, 2 insertions(+), 7 deletions(-)

(limited to 'lib')

diff --git a/lib/irb.rb b/lib/irb.rb
index 9a3a491641..0c145069c0 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -389,11 +389,7 @@ module IRB
   #
   # Will raise an Abort exception, or the given +exception+.
   def IRB.irb_abort(irb, exception = Abort)
-    if defined? Thread
-      irb.context.thread.raise exception, "abort then interrupt!"
-    else
-      raise exception, "abort then interrupt!"
-    end
+    irb.context.thread.raise exception, "abort then interrupt!"
   end
 
   class Irb
diff --git a/lib/irb/context.rb b/lib/irb/context.rb
index b74cae1223..a3b7dda8cd 100644
--- a/lib/irb/context.rb
+++ b/lib/irb/context.rb
@@ -32,7 +32,7 @@ module IRB
       else
         @workspace = WorkSpace.new
       end
-      @thread = Thread.current if defined? Thread
+      @thread = Thread.current
 
       # copy of default configuration
       @ap_name = IRB.conf[:AP_NAME]
diff --git a/lib/irb/ext/multi-irb.rb b/lib/irb/ext/multi-irb.rb
index 74de1ecde5..e57d43a569 100644
--- a/lib/irb/ext/multi-irb.rb
+++ b/lib/irb/ext/multi-irb.rb
@@ -9,7 +9,6 @@
 #
 #
 #
-fail CantShiftToMultiIrbMode unless defined?(Thread)
 
 module IRB
   class JobManager
-- 
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