From a9ebd59d3a49b1e929ae8658f84d3a29a360e10e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 11 Aug 2026 22:24:56 +0900
Subject: [PATCH] Support JSON 3 in JSON index generation

JSON 3 interprets the third argument as options, causing index generation
to fail when it receives the previous integer depth limit.
---
 lib/rdoc/generator/json_index.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/rdoc/generator/json_index.rb b/lib/rdoc/generator/json_index.rb
index 065419b296..402634baf0 100644
--- a/lib/rdoc/generator/json_index.rb
+++ b/lib/rdoc/generator/json_index.rb
@@ -143,7 +143,7 @@ def generate
       io.set_encoding Encoding::UTF_8
       io.write 'var search_data = '
 
-      JSON.dump data, io, 0
+      JSON.dump data, io
     end
     unless ENV['SOURCE_DATE_EPOCH'].nil?
       index_file.utime index_file.atime, Time.at(ENV['SOURCE_DATE_EPOCH'].to_i).gmtime