nobu	2014-07-04 15:32:44 +0900 (Fri, 04 Jul 2014)

  New Revision: 46689

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=46689

  Log:
    string.c: rb_fstring_new assumes US-ASCII
    
    * string.c (rb_fstring_new): make US-ASCII string.  another
      function may be used for non-ASCII strings.

  Modified files:
    trunk/string.c
Index: string.c
===================================================================
--- string.c	(revision 46688)
+++ string.c	(revision 46689)
@@ -226,11 +226,13 @@ rb_fstring(VALUE str) https://github.com/ruby/ruby/blob/trunk/string.c#L226
 }
 
 static VALUE
-setup_fake_str(struct RString *fake_str, const char *name, long len)
+setup_fake_str(struct RString *fake_str, const char *name, long len, int encidx)
 {
     fake_str->basic.flags = T_STRING|RSTRING_NOEMBED|ELTS_SHARED;
     /* SHARED to be allocated by the callback */
 
+    ENCODING_SET_INLINED((VALUE)fake_str, encidx);
+
     RBASIC_SET_CLASS((VALUE)fake_str, rb_cString);
     fake_str->as.heap.len = len;
     fake_str->as.heap.ptr = (char *)name;
@@ -242,8 +244,7 @@ VALUE https://github.com/ruby/ruby/blob/trunk/string.c#L244
 rb_fstring_new(const char *ptr, long len)
 {
     struct RString fake_str;
-
-    return rb_fstring(setup_fake_str(&fake_str, ptr, len));
+    return rb_fstring(setup_fake_str(&fake_str, ptr, len, ENCINDEX_US_ASCII));
 }
 
 static int

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