Corrupted PDF with lualatex + gs 10.04.0

[Denis Bitouzé]

Le 19/12/24 à 04h16, Bruno Voisin via tex-live a écrit :

> I can confirm this on the Mac, but only provided the PDF files are
> opened with Acrobat. If the PDF files are opened with the macOS
> built-in Preview, copy-and-paste gives "Foo." with both PDF files (ie,
> LuaTeX-produced test.pdf and Ghostscript-produced test.pdf.pdf).

Quite strange...

>> Denis wrote later:
>> 
>> OK. Do you know what would be the best place and the best way to report
>> this issue?
>
> The gs-devel list (suggested by Zdenek and Reinhard) lives at
>
> https://www.ghostscript.com/mailman/index.html
>
> You need to subscribe to be able to post, IIRC. There used to be
> a public archive, but it couldn't be brought back online after the
> list server switched from mailman 2 to 3.
>
> The other option, which Denis used, is Bugzilla
>
> https://bugs.ghostscript.com
>
> As you saw, the developers are quite responsive.

Indeed! :)

>> Following Ken Sharp's answer on Bugzilla, Denis asked there:
>> 
>> Could you please explain in what the current bug is a duplicate of
>> bug 708042, and what to do to get rid of this issue?
>
> Attempting a quick answer here:
>
> - Ken explains this by a non-standard ToUnicode CMap
>
> https://bugs.ghostscript.com/show_bug.cgi?id=708042#c3
>
> (though the CMap given there differs from those reported by Zdenek).

That's what puzzled me.

> - gs 10.04.0 was released on September 18, whereas Ken's commit
> (fixing the issue) is from the next day, September 19. Thus you need
> to get the development 10.05.0 version, say with
>
> git clone -b master https://git.ghostscript.com/ghostpdl.git
>
> and compile it. Or just apply the commit
>
> https://cgit.ghostscript.com/cgi-bin/cgit.cgi/ghostpdl.git/commit/?id=65f6ea3c1660ea05b6a575cbe738e66e54b9a497
>
> to the 10.04.0 sources
>
> https://www.ghostscript.com/releases/gsdnld.html
>
> and compile the result.

OK.

> On the Mac, you need to install m4, autoconf and automake first (in this
> order). Then, for gs, you compile with
>
> ./autogen.sh --disable-compile-inits
> make gs
> sudo make install
>
> After that, the problem's gone. Namely, using gs 10.04.0, opening the PDF file
> in Acrobat, copying the content and pasting it in a text editor, I get
>
> 􀀶􀁑􀁑􀁘
>
> Doing the same with the 10.05.0 development version, I get
>
> Foo.

OK, many thanks for these insights!
-- 
Denis