naruse	2008-02-22 11:18:23 +0900 (Fri, 22 Feb 2008)

  New Revision: 15571

  Modified files:
    trunk/ChangeLog
    trunk/string.c

  Log:
    * string.c (rb_str_substr): copy encoding although empty string.

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/string.c?r1=15571&r2=15570&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=15571&r2=15570&diff_format=u

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 15570)
+++ ChangeLog	(revision 15571)
@@ -1,3 +1,7 @@
+Fri Feb 22 11:16:55 2008  NARUSE, Yui  <naruse@r...>
+
+	* string.c (rb_str_substr): copy encoding although empty string.
+
 Fri Feb 22 04:48:22 2008  NARUSE, Yui  <naruse@r...>
 
 	* string.c (rb_str_times): empty string's coderange is CODERANGE_7BIT.
Index: string.c
===================================================================
--- string.c	(revision 15570)
+++ string.c	(revision 15571)
@@ -1242,7 +1242,10 @@
     else {
 	str2 = rb_str_new5(str, p, len);
 	if (len) rb_enc_cr_str_copy(str2, str);
-	else ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
+	else {
+	    rb_enc_copy(str2, str);
+	    ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
+	}
 	OBJ_INFECT(str2, str);
     }
 

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