* string.c (sym_inspect): Escape when the symbol is not

resulted encoding and not ascii_only. It had escaped
  ascii-incompatible string, but it is wrong.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28176 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat Jun  5 01:20:14 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* string.c (sym_inspect): Escape when the symbol is not
+	  resulted encoding and not ascii_only. It had escaped
+	  ascii-incompatible string, but it is wrong.
+
 Sat Jun  5 01:10:12 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* string.c (rb_str_buf_cat_escaped_char): defined.

string.c

@@ -7078,12 +7078,14 @@ sym_inspect(VALUE sym)
     const char *ptr;
     long len;
     char *dest;
+    rb_encoding *resenc = rb_default_internal_encoding();
 
+    if (resenc == NULL) resenc = rb_default_external_encoding();
     sym = rb_id2str(id);
     enc = STR_ENC_GET(sym);
     ptr = RSTRING_PTR(sym);
     len = RSTRING_LEN(sym);
-    if (!rb_enc_asciicompat(enc) || len != (long)strlen(ptr) ||
+    if ((resenc != enc && !rb_str_is_ascii_only_p(sym)) || len != (long)strlen(ptr) ||
 	!rb_enc_symname_p(ptr, enc) || !sym_printable(ptr, ptr + len, enc)) {
 	str = rb_str_inspect(sym);
 	len = RSTRING_LEN(str);