From d17a1a084eca29dbb9ff284daa3a31858292bfcc Mon Sep 17 00:00:00 2001
From: Oskar Eichler <oskar@songstats.com>
Date: Fri, 28 Aug 2026 01:04:34 +0300
Subject: [PATCH] Wrap multibyte split results without removed String
 extensions

---
 CHANGELOG.rdoc              | 2 ++
 lib/mail/multibyte/chars.rb | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rdoc b/CHANGELOG.rdoc
index 4727518dd..ab36dffe4 100644
--- a/CHANGELOG.rdoc
+++ b/CHANGELOG.rdoc
@@ -22,6 +22,8 @@ Code Improvements:
 
 Bug Fixes:
 
+* Wrap multibyte split results without removed String extensions @OskarEichler
+
 * Regression: Preserve message-level charset when adding parts (related to Rails ActionMailer) @shields
 * Regression: Adding a part should not reset the mail's charset to nil @railsbob
 
diff --git a/lib/mail/multibyte/chars.rb b/lib/mail/multibyte/chars.rb
index 6afa41e77..17e1aa921 100644
--- a/lib/mail/multibyte/chars.rb
+++ b/lib/mail/multibyte/chars.rb
@@ -89,7 +89,7 @@ def =~(other)
       # Example:
       #   Mail::Multibyte.mb_chars('Café périferôl').split(/é/).map { |part| part.upcase.to_s } # => ["CAF", " P", "RIFERÔL"]
       def split(*args)
-        @wrapped_string.split(*args).map { |i| i.mb_chars }
+        @wrapped_string.split(*args).map { |i| chars(i) }
       end
 
       # Like <tt>String#[]=</tt>, except instead of byte offsets you specify character offsets.