From @masak

<masak> rakudo​: class Dog {}; say Dog.defined; Dog .= new; say Dog.defined
<p6eval> rakudo d396ab​: OUTPUT«0␤1␤»
<masak> o_O
<masak> you can instantiate type objects!
<pmichaud> well, technically a type object is already instantiated,
it's just not defined.
<pmichaud> you told the type object to build itself, so it did :-P
<pmichaud> I think I definitely want to do our readonly refactor soon, though.
<masak> oh, that would solve that?
<pmichaud> yes.
<pmichaud> currently we mark which objects are readonly, and refuse to
write to those. I'd like to reverse that, so that we mark the objects
that are rw, and refuse to write to anything that isn't so marked
<masak> so I don't need to submit something for this?
* masak grins
<pmichaud> you can submit it if you like -- I don't know the timeline
for that refactor yet.
* masak submits

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S12-construction/new.t

commit c580fe86e3cb3b391a413b1cffdbe3bcf266c92d
Author​: kyle <kyle@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Wed Nov 4 20​:09​:15 2009 +0000

  [t/spec] Test for RT #​66204​: NewClass .= new should die
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;28984 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S12-construction/new.t b/t/spec/S12-construction/new.t
index d4c93a3..0be3f8e 100644
--- a/t/spec/S12-construction/new.t
+++ b/t/spec/S12-construction/new.t
@@ -1,7 +1,7 @@
 use v6;
 use Test;
 
-plan 12;
+plan *;
 
 class Parent {
     has $.x;
@@ -36,4 +36,15 @@ lives_ok { $o = GrandChild.new( Parent{ :x<5> }, Child{ :y(4) }) },
 is $o.y, 4, '... worked for the class Child (other order)';
 is $o.x, 5, '... worked for the class Parent (other order)';
 
+# RT #66204
+{
+    class RT66204 {}
+    ok ! RT66204.defined, 'NewClass is not .defined';
+    #?rakudo 2 todo 'RT 66204'
+    dies_ok { RT66204 .= new }, 'class asked to build itself refuses';
+    ok ! RT66204.defined, 'NewClass is still not .defined';
+}
+
+done_testing;
+
 # vim: ft=perl6

The RT System itself - Status changed from 'new' to 'open'

From @moritz

problem fixed, tests pass now...

@moritz - Status changed from 'open' to 'resolved'