[MacRuby-devel] [MacRuby] #312: reopening a class and setNeedsDisplay: segfault

[MacRuby]

#312: reopening a class and setNeedsDisplay: segfault
-------------------------------------+--------------------------------------
 Reporter:  mattaimonetti@…          |        Owner:  lsansonetti@…        
     Type:  defect                   |       Status:  closed               
 Priority:  critical                 |    Milestone:  MacRuby 0.5          
Component:  MacRuby                  |   Resolution:  invalid              
 Keywords:                           |  
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Changes (by martinlagardette@…):

  * status:  new => closed
  * resolution:  => invalid


Comment:

 Also, I would suggest doing something more Cocoa-y, to make sure `CALayer`
 `-init` is called:
 {{{
 #!ruby
 framework 'Cocoa'
 class ImageLayer < CALayer
   def initialize(file_name)
     if init
       @filename = file_name
     end
     self
   end
 end
 ImageLayer.new("test").setNeedsDisplay
 }}}

 This will actually call `CALayer`'s `-init`, which I think is not called
 at all in your 1st and 3rd example, hence the crash in `-setNeedsDisplay`,
 the `CALayer` not being initalized properly.

 In the second example you linked, `initialize` is never called, so `-init`
 is actually called and that's why it works. You can see by doing:
 {{{
 #!ruby
 framework 'Cocoa'
 class ImageLayer < CALayer; def initialize; super(); p "rb init"; end; end
 ImageLayer.new.setNeedsDisplay # => nil
 }}}
 {{{
 $> macruby t.rb
 $>
 }}}

 I'll close this bug, but feel free to re-open it if I'm wrong / if I
 missed something :-)

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/312#comment:2>
MacRuby <http://macruby.org/>