file.c: ASCII-compatible

* file.c (rb_file_join): need to check again after any conversion run.
  [ruby-core:48012] [Bug ruby#7168]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37216 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Oct 16 14:56:23 2012  Nobuyoshi Nakada  <[email protected]>
+
+	* file.c (rb_file_join): need to check again after any conversion run.
+	  [ruby-core:48012] [Bug #7168]
+
 Tue Oct 16 12:52:14 2012  Kazuhiro NISHIYAMA  <[email protected]>
 
 	* test/ruby/envutil.rb (Test::Unit::Assertions#assert_file):

file.c

@@ -3917,6 +3917,7 @@ rb_file_join(VALUE ary, VALUE sep)
     long len, i;
     VALUE result, tmp;
     const char *name, *tail;
+    int checked = TRUE;
 
     if (RARRAY_LEN(ary) == 0) return rb_str_new(0, 0);
 
@@ -3942,6 +3943,7 @@ rb_file_join(VALUE ary, VALUE sep)
 	tmp = RARRAY_PTR(ary)[i];
 	switch (TYPE(tmp)) {
 	  case T_STRING:
+	    if (!checked) check_path_encoding(tmp);
 	    StringValueCStr(tmp);
 	    break;
 	  case T_ARRAY:
@@ -3958,6 +3960,7 @@ rb_file_join(VALUE ary, VALUE sep)
 	    break;
 	  default:
 	    FilePathStringValue(tmp);
+	    checked = FALSE;
 	}
 	RSTRING_GETMEM(result, name, len);
 	if (i == 0) {