https://git.ruby-lang.org/ruby.git/commit/?id=582b5705ab

From 582b5705abf70318b00be7c3cb9a41bbe4897a20 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Thu, 20 May 2021 19:40:09 +0900
Subject: [ruby/reline] Check existance of a constant, Fiddle::VERSION

https://github.com/ruby/reline/commit/4b74c3d83a
---
 lib/reline/terminfo.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/reline/terminfo.rb b/lib/reline/terminfo.rb
index 1029d79..cfc8280 100644
--- a/lib/reline/terminfo.rb
+++ b/lib/reline/terminfo.rb
@@ -9,7 +9,7 @@ module Reline::Terminfo https://github.com/ruby/ruby/blob/trunk/lib/reline/terminfo.rb#L9
   @curses_dl = nil
   def self.curses_dl
     return @curses_dl if @curses_dl
-    if Gem::Version.create(Fiddle::VERSION) >= Gem::Version.create('1.0.1')
+    if Fiddle.const_defined?(:VERSION) and Gem::Version.create(Fiddle::VERSION) >= Gem::Version.create('1.0.1')
       # Fiddle::TYPE_VARIADIC is supported from Fiddle 1.0.1.
       %w[libncursesw.so libcursesw.so libncurses.so libcurses.so].each do |curses_name|
         result = Fiddle::Handle.new(curses_name)
-- 
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