https://git.ruby-lang.org/ruby.git/commit/?id=28a572f8bf

From 28a572f8bffe54226a7ad3fae814c1c92b5036e6 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@p...>
Date: Tue, 27 Sep 2022 14:54:09 -0400
Subject: Fix bug when slicing a string with broken encoding

Commit aa2a428 introduced a bug where non-embedded string slices copied
the encoding of the original string. If the original string had a broken
encoding but the slice has valid encoding, then the slice would be
incorrectly marked as broken encoding.
---
 string.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/string.c b/string.c
index bdab6fa143..78ac5591cc 100644
--- a/string.c
+++ b/string.c
@@ -2811,6 +2811,7 @@ str_subseq(VALUE str, long beg, long len) https://github.com/ruby/ruby/blob/trunk/string.c#L2811
     }
     else {
         str2 = str_new_shared(rb_cString, str);
+        ENC_CODERANGE_CLEAR(str2);
         RSTRING(str2)->as.heap.ptr += beg;
         if (RSTRING(str2)->as.heap.len > len) {
             RSTRING(str2)->as.heap.len = len;
-- 
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