diff --git a/NEWS.md b/NEWS.md
index b3f756632f61ab..48b9ab421c635b 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -127,7 +127,7 @@ The following bundled gems are promoted from default gems.
 * rdoc 6.14.2
 * win32ole 1.9.2
 * irb 1.15.2
-* reline 0.6.1
+* reline 0.6.2
 * readline 0.0.4
 * fiddle 1.1.8
 
diff --git a/encoding.c b/encoding.c
index 6fbb739bb631b7..7c54ba9177e10f 100644
--- a/encoding.c
+++ b/encoding.c
@@ -244,14 +244,14 @@ must_encindex(int index)
         rb_raise(rb_eEncodingError, "encoding index out of bound: %d",
                  index);
     }
-    if (ENC_TO_ENCINDEX(enc) != (int)(index & ENC_INDEX_MASK)) {
-        rb_raise(rb_eEncodingError, "wrong encoding index %d for %s (expected %d)",
-                 index, rb_enc_name(enc), ENC_TO_ENCINDEX(enc));
-    }
     if (rb_enc_autoload_p(enc) && rb_enc_autoload(enc) == -1) {
         rb_loaderror("failed to load encoding (%s)",
                      rb_enc_name(enc));
     }
+    if (ENC_TO_ENCINDEX(enc) != (int)(index & ENC_INDEX_MASK)) {
+        rb_raise(rb_eEncodingError, "wrong encoding index %d for %s (expected %d)",
+                 index, rb_enc_name(enc), ENC_TO_ENCINDEX(enc));
+    }
     return enc;
 }
 
@@ -792,26 +792,33 @@ enc_autoload_body(rb_encoding *enc)
                 }
             } while (enc_table->list[i].enc != base && (++i, 1));
         }
-    }
 
-    if (i == -1) return -1;
+        if (i != -1) {
+            if (base) {
+                bool do_register = true;
+                if (rb_enc_autoload_p(base)) {
+                    if (rb_enc_autoload(base) < 0) {
+                        do_register = false;
+                        i = -1;
+                    }
+                }
 
-    if (base) {
-        if (rb_enc_autoload_p(base)) {
-            if (rb_enc_autoload(base) < 0) return -1;
-        }
-        i = enc->ruby_encoding_index;
+                i = enc->ruby_encoding_index;
+                if (do_register) {
+                    enc_register_at(enc_table, i & ENC_INDEX_MASK, rb_enc_name(enc), base);
+                    ((rb_raw_encoding *)enc)->ruby_encoding_index = i;
+                }
 
-        GLOBAL_ENC_TABLE_LOCKING(enc_table) {
-            enc_register_at(enc_table, i & ENC_INDEX_MASK, rb_enc_name(enc), base);
+                i &= ENC_INDEX_MASK;
+            }
+            else {
+                i = -2;
+            }
         }
 
-        ((rb_raw_encoding *)enc)->ruby_encoding_index = i;
-        i &= ENC_INDEX_MASK;
-        return i;
     }
 
-    return -2;
+    return i;
 }
 
 int
diff --git a/gems/bundled_gems b/gems/bundled_gems
index a040f93a34db31..4fed6a994d8766 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -42,6 +42,6 @@ logger              1.7.0   https://github.com/ruby/logger
 rdoc                6.14.2  https://github.com/ruby/rdoc
 win32ole            1.9.2   https://github.com/ruby/win32ole
 irb                 1.15.2  https://github.com/ruby/irb 331c4e851296b115db766c291e8cf54a2492fb36
-reline              0.6.1   https://github.com/ruby/reline
+reline              0.6.2   https://github.com/ruby/reline
 readline            0.0.4   https://github.com/ruby/readline
 fiddle              1.1.8   https://github.com/ruby/fiddle
diff --git a/spec/bundler/support/hax.rb b/spec/bundler/support/hax.rb
index 772a125ec7e71f..46718f5fa43c43 100644
--- a/spec/bundler/support/hax.rb
+++ b/spec/bundler/support/hax.rb
@@ -66,3 +66,9 @@ def getaddrinfo(host, port)
     Socket.singleton_class.prepend FakeResolv
   end
 end
+
+# mise installed rubygems_plugin.rb to system wide `site_ruby` directory.
+# This empty module avoid to call `mise` command.
+module ReshimInstaller
+  def self.reshim; end
+end
diff --git a/test/rubygems/helper.rb b/test/rubygems/helper.rb
index af78bab724a4b5..2f4abff1e84ca9 100644
--- a/test/rubygems/helper.rb
+++ b/test/rubygems/helper.rb
@@ -1578,3 +1578,9 @@ def stub(name, val_or_callable, *block_args)
 end
 
 require_relative "utilities"
+
+# mise installed rubygems_plugin.rb to system wide `site_ruby` directory.
+# This empty module avoid to call `mise` command.
+module ReshimInstaller
+  def self.reshim; end
+end