なかだです。

  $ ruby -e X = Class.new; p X.name'
  ""

  $ ruby -e X = Class.new; X.inspect; p X.name'
  "X"

となります。1.6ではどちらも"X"です。

おそらくruby-bug-ja:PR#424の副作用のようですが。


Index: variable.c
===================================================================
RCS file: //sharui/cvs/ruby/src/ruby/variable.c,v
retrieving revision 1.93
diff -u -2 -p -r1.93 variable.c
--- variable.c	3 Jul 2003 11:00:18 -0000	1.93
+++ variable.c	3 Jul 2003 13:10:17 -0000
@@ -21,5 +21,5 @@
 static st_table *rb_global_tbl;
 st_table *rb_class_tbl;
-static ID autoload;
+static ID autoload, classpath, tmp_classpath;
 
 void
@@ -29,4 +29,6 @@ Init_var_tables()
     rb_class_tbl = st_init_numtable();
     autoload = rb_intern("__autoload__");
+    classpath = rb_intern("__classpath__");
+    tmp_classpath = rb_intern("__tmp_classpath__");
 }
 
@@ -50,5 +52,5 @@ fc_path(fc, name)
 	if (fc->track == rb_cObject) break;
 	if (ROBJECT(fc->track)->iv_tbl &&
-	    st_lookup(ROBJECT(fc->track)->iv_tbl, rb_intern("__classpath__"), &tmp)) {
+	    st_lookup(ROBJECT(fc->track)->iv_tbl, classpath, &tmp)) {
 	    tmp = rb_str_dup(tmp);
 	    rb_str_cat2(tmp, "::");
@@ -132,5 +134,5 @@ find_class_path(klass)
 	    ROBJECT(klass)->iv_tbl = st_init_numtable();
 	}
-	st_insert(ROBJECT(klass)->iv_tbl,rb_intern("__classpath__"),arg.path);
+	st_insert(ROBJECT(klass)->iv_tbl, classpath, arg.path);
 	return arg.path;
     }
@@ -143,5 +145,5 @@ classname(klass)
 {
     VALUE path = Qnil;
-    ID classpath = rb_intern("__classpath__");
+    ID tmppath = tmp_classpath;
 
     klass = rb_class_real(klass);
@@ -152,5 +154,5 @@ classname(klass)
 
 	    if (!st_lookup(ROBJECT(klass)->iv_tbl, classid, &path)) {
-		return Qnil;
+		return find_class_path(klass);
 	    }
 	    path = rb_str_new2(rb_id2name(SYM2ID(path)));
@@ -163,5 +165,5 @@ classname(klass)
 	return path;
     }
-    return Qnil;
+    return find_class_path(klass);
 }
 
@@ -184,12 +186,7 @@ rb_class_path(klass)
     if (!NIL_P(path)) return path;
     else {
-	ID tmppath = rb_intern("__tmp_classpath__");
+	ID tmppath = tmp_classpath;
 	char *s = "Class";
 
-	path = find_class_path(klass);
-	if (!NIL_P(path)) {
-	    st_delete(RCLASS(klass)->iv_tbl, &tmppath, 0);
-	    return path;
-	}
 	if (RCLASS(klass)->iv_tbl && st_lookup(RCLASS(klass)->iv_tbl, tmppath, &path)) {
 	    return path;
@@ -207,5 +204,5 @@ rb_class_path(klass)
 	sprintf(RSTRING(path)->ptr, "#<%s:0x%lx>", s, klass);
 	RSTRING(path)->len = strlen(RSTRING(path)->ptr);
-	rb_iv_set(klass, "__tmp_classpath__", path);
+	rb_ivar_set(klass, tmp_classpath, path);
 
 	return path;
@@ -228,5 +225,5 @@ rb_set_class_path(klass, under, name)
 	rb_str_cat2(str, name);
     }
-    rb_iv_set(klass, "__classpath__", str);
+    rb_ivar_set(klass, classpath, str);
 }
 


-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦