From 1da2b2e7b991121f9114200ec76e36c682453090 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 28 Oct 2016 14:18:50 +0000
Subject: transcode-tblgen.rb: dup literal string

* tool/transcode-tblgen.rb: get rid of modifying frozen literal
  string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56512 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 tool/transcode-tblgen.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'tool')

diff --git a/tool/transcode-tblgen.rb b/tool/transcode-tblgen.rb
index ec417ec5b0..f43627b781 100644
--- a/tool/transcode-tblgen.rb
+++ b/tool/transcode-tblgen.rb
@@ -1031,7 +1031,7 @@ if __FILE__ == $0
   VERBOSE_MODE = verbose_mode
 
   OUTPUT_FILENAME = output_filename
-  OUTPUT_PREFIX = output_filename ? File.basename(output_filename)[/\A[A-Za-z0-9_]*/] : ""
+  OUTPUT_PREFIX = output_filename ? File.basename(output_filename)[/\A[A-Za-z0-9_]*/] : "".dup
   OUTPUT_PREFIX.sub!(/\A_+/, '')
   OUTPUT_PREFIX.sub!(/_*\z/, '_')
 
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