From b2b5ed14104d2010ceae9fc81823bdcdc84b3bd7 Mon Sep 17 00:00:00 2001
From: Kazuki Tsujimoto <kazuki@callcc.net>
Date: Tue, 28 May 2019 01:30:15 +0900
Subject: [PATCH] Supress duplicated warning

---
 lib/irb/ruby-lex.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index a14ac8a275..4121fa1f7c 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -152,6 +152,7 @@ class RubyLex
     end
 
     begin # check if parser error are available
+      verbose, $VERBOSE = $VERBOSE, nil
       RubyVM::InstructionSequence.compile(code)
     rescue SyntaxError => e
       case e.message
@@ -199,6 +200,8 @@ class RubyLex
         #     method / f /
         return false
       end
+    ensure
+      $VERBOSE = verbose
     end
 
     last_lex_state = @tokens.last[3]