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Re: problem with gnustep on OpenBSD sparc64

From: David Chisnall
Subject: Re: problem with gnustep on OpenBSD sparc64
Date: Wed, 6 Jul 2011 11:02:08 +0100

On 6 Jul 2011, at 10:55, Sebastian Reitenbach wrote:

> Error: Instance variables in NSTextTable overlap superclass NSTextBlock.  
> Offset of first instance variable, _layoutAlgorithm, is 196.  Last instance 
> variable in superclass, _widthType, ends at offset 148.  This probably means 
> that you are subclassing aclass from a library, which has changed in a 
> binary-incompatibleway.

I think this is a bug in how libobjc2 is calculating sizes.  The last ivar of 
NSTextBlock is an array of arrays, and my guess is that the runtime thinks that 
it is smaller than it is.


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