[Dev-luatex] SIGFPE when writing PK files

Hans Hagen pragma at wxs.nl
Thu Mar 17 09:42:22 CET 2016


On 3/16/2016 9:39 PM, Martin Mares wrote:
> Hello once again,
>
> after fixing the alignment problem, my compilation now fails
> a couple of pages later: luatex crashes with SIGFPE when trying
> to write a PK font.
>
> I do not have a simple test case yet, but I think I see the problem
> in the source: in source/texk/web2c/luatexdir/font/writet3.w, function
> writepk(), one call to pdf_printf() divides by newdpi, which can be
> zero when pk_fixed_dpi is not set.
>
> What is the intention behind dpi vs. newdpi?
>
> (By the way, is pk_fixed_dpi documented somewhere?)

that's an experiment for cases where you have a (say) 2400 dpi pk file 
and don't mind it being used for lower resolutions ... this can be the 
case when you use a few bitmap chars as drop in for missing ones; it 
then also permits to distribute just one instance

Hans

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