[Kde-bindings] Constructor error with QtRuby redux

Richard Dale Richard_Dale at tipitina.demon.co.uk
Tue Dec 6 10:23:34 UTC 2005

On Tuesday 06 December 2005 01:41, Caleb Tennis wrote:
> It seems that last month's issues with Debian are creeping over to Gentoo.
> Namely, any Ruby version >1.8.3 (that is, 1.8.4_pre{1,2}) exhibit the same
> issue, where no initializer code is run after a "super" call.
> I put in a few debugging "puts"es, but I'm not set up to fully debug the
> cpp source at the moment.  however, I'm never seeing
> Internal.try_initialize get called, which is a bit bothersome.  I'll
> continue investigating in the morning unless someone else gets to it.
Oh dear - I was assuming this was an issue with the way Qt was built. It looks 
like this throw at the end of qt_initialize() is never caught, I don't know 

    // Off with a longjmp, never to return..
    rb_throw("newqt", result);
    return self;

It should be caught here:

		# Runs the initializer as far as allocating the Qt C++ instance.
		# Then use a throw to jump back to here with the C++ instance 
		# wrapped in a new ruby variable of type T_DATA
		def Internal.try_initialize(instance, *args)
			initializer = instance.method(:initialize)
			catch "newqt" do

I can't remember previous bug reports saying it only happened with very recent 
versions of ruby though.

-- Richard

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