From 7bcf52edc5db0bf554275ae038d7902ef3075339 Mon Sep 17 00:00:00 2001
From: Charles Oliver Nutter <headius@headius.com>
Date: Tue, 29 Mar 2022 14:50:42 -0500
Subject: [PATCH] Avoid using block_given in the presence of aliases

defined?(yield) bypasses the block_given? method (or any aliases
to it) and always does the right thing.
---
 lib/ostruct.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index efe5f4f..c5d22dc 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -197,7 +197,7 @@ def to_h(&block)
   #   data.each_pair.to_a   # => [[:country, "Australia"], [:capital, "Canberra"]]
   #
   def each_pair
-    return to_enum(__method__) { @table.size } unless block_given!
+    return to_enum(__method__) { @table.size } unless defined?(yield)
     @table.each_pair{|p| yield p}
     self
   end