Option '-tex lualatex' makes an unexpected shift

[lemniscati]

Asymptote 2.49 with LuaLaTeX 1.10 as engine on Cygwin makes an unexpected shift.
Is it an issue on Asymptote or on LuaLaTeX?

A test file a.asy:

real s=30;
draw(scale(s)*unitsquare,defaultpen+.5mm);
label("\TeX",scale(s)*(.5,.5));

Compiling as follows results in default.pdf and lualatex.pdf.

asy -f pdf -o default a
asy -f pdf -o lualatex -tex lualatex a

And, default.pdf has no problem, but lualatex.pdf has unexpected shift.

[johncbowman]

I tested this example with TeXLive 2019 and I can't see any difference between the two outputs.
I tried the current obsolete version Asymptote 2.49 and the latest stable version, 2.61, which I am just about to release...

[lemniscati]

Checking logs, and noticed the followings:

It seems to depend on whether luaotfload is successfully loaded through lualatex.

When luaotfload-main.lua is succesfully loaded on lualatex, it makes an unexpected shift.
But when luaotfload-main.lua is not found, it makes no unexpected shift.

Please, check kpsewhich luaotfload-main.lua.

Maybe, this issue is attributed to luaotfload...

[johncbowman]

Here is what I get (however, I have no idea what luaotfload-main is or how it might get loaded by your example; maybe there is a problem with your path?):

/usr/local/texlive/2019/texmf-dist/tex/luatex/luaotfload/luaotfload-main.lua

[johncbowman]

I do see the line:
luaotfload | main : initialization completed in 0.141 seconds
Can you post an example pdf that illustrates the shift you are seeing?

[lemniscati]

Thank you for testing.

Here is an example with unexpected shift
lualatex.pdf

and intermediate files
lualatex_with_luaotfload-main.zip

[lemniscati]

And, here is an example without unexpected shift
lualatex.pdf

and intermediate files
lualatex_without_luaotfload-main.zip

[lemniscati]

@johncbowman, please reopen the issue.

It can happen on Ubuntu 18.04 with TeX Live 2017, not only on Cygwin.

https://cygwin.com/ml/cygwin/2019-11/msg00137.html

And, on cygwin, I tried compiling from the source with ec3c7f0 (Asymptote version 2.62-3), and got same results (A logo TeX and an unit square are shifted to the right with luaotfload-main.lua).

[johncbowman]

I could never see what was bothering you as the TeX label looks properly typeset and centered in the square in both examples that you posted. I now see that you are referring to a tiny horizontal offset of 0.4bp of the bounding box. It looks like a lualatex bug. I can change \hoffset in the generated texfile from -1in to -72.4bp as a temporary work around, until a proper fix is made in the lualatex sources.

[johncbowman]

A workaround was implemented in commit 41fbc67.
Please test that this works with and without luaotfload.

[lemniscati]

It works.
Thank you, @johncbowman!

I tested on cygwin in following cases. But I think the first case is important and sufficient, because both of luaotfload.sty and luaotfload-main.lua come with luatex/lualatex.

1. With luaotfload.sty and with luaotfload-main.lua: OK.
2. Without luaotfload.sty and with luaotfload-main.lua: OK.
3. With luaotfload.sty and without luaotfload-main.lua: shifted to the left.
4. Without luaotfload.sty and without luaotfload-main.lua: shifted to the left.