Re: LZW decompression

[Alexei Podtelezhnikov]

> > During my memory management review, I noticed
> > ft_lzwstate_stack_grow.  It seems to drop stack_0 when relocating to
> > the heap memory without copying it.  How is this even supposed to
> > work?  Would you please take a look at this function?
>
> Good question.  My knowledge of LZW stuff is zero, sorry.
>
> Is relocation ever triggered while uncompressing fonts?  If yes, is
> the corresponding font correctly read and displayed?

The 64-byte loss seems obvious. It might be recovered later however. I
found 2 bugs related to this code path:
https://bugs.freedesktop.org/show_bug.cgi?id=8633
https://bugs.freedesktop.org/show_bug.cgi?id=8063 or
https://savannah.nongnu.org/bugs/index.php?19910

There are 6 fonts listed () that might trigger a problem.

hanglg16.pcf.Z   hanglm16.pcf.Z   hanglm24.pcf.Z   jiskan16.pcf.Z
jiskan24.pcf.Z   k14.pcf.Z


Alexei