CTLayout class in VCL/quartz has member mpTextStyle of type CoreTextStyle class which is initialised from AquaSalGraphics. But during pdf export, Drawlayout function calculates font matric which temporarily replace font with another font for matric calculation. thus mpTextStyle pointer get released and AquaSalGraphics creates another CoreTextStyle for same font and CTLayout has illegal memory. So CTLayout mpTextStyle should be pointer to pointer instead of simple pointer. It may be substitution related issue.
Please provide more information on the issue you are seeing.
To diagnose the issue, it would be useful if you could attach:
- A sample document to reproduce the issue
- A backtrace from the crash
It seems from your comment that you already have a theory about the cause of the crash. If so, it would also be helpful if you could mention the specific source files and line numbers involved
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I created a thread here http://nabble.documentfoundation.org/About-tdf-81054-MacOs-Random-crash-td4146733.html but we really need more information.
1) A file to reproduce the problem
2) A step by step process to reproduce the crash
Since I've got a Mac, I can give a try and may retrieve a bt.
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This INVALID Message was generated on: 2015-05-06