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From TeXLive-2011: luatex complains:

! LuaTeX error ...1/texmf-dist/tex/luatex/luaotfload/otfl-font-nms.lua:525: Cannot open the file $HOME/.config/font-manager/local.conf

where $HOME is the path of my home directory.

What is wrong and how can I fix it?

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is the $HOME environment variable actually defined (or defined correctly) on your system? – ArTourter Jun 14 '12 at 18:03
Please add a minimal working example (MWE) that illustrates your problem. – Martin Schröder Jun 14 '12 at 18:11
Some of your font configuration files is including a non-existent $HOME/.config/font-manager/local.conf, check ~/.fonts.conf or ~/.fonts.conf.d/. But raising an error here is too much, luaotfload should fail gracefully (printing a message to the log is all it should do). – Khaled Hosny Jun 14 '12 at 18:43
1  
Aaaaah... stracing showed: 8245 open("(MY HOME DIR)/.config/font-manager/local.conf", O_RDONLY) = -1 EMFILE (Too many open files) – monniaux Jun 14 '12 at 20:48
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The reason is that lualatex opens this local.conf file several thousand times, without ever closing it, until the system refuses to open file descriptors (as seen from stracing). I consider this a bug in lualatex. – monniaux Jun 14 '12 at 21:02
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2 Answers

up vote 2 down vote

For some reason, lualatex opens ~/.config/font-manager/local.conf repeatedly, without ever closing it, until the operating system refuses to return new file descriptors.

This most likely comes from a bug in lualatex, perhaps triggered for systems with many fonts installed.

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May be you have a cyclic include somewhere, putting the code into an infinite loop, that is the only way I see this happening. – Khaled Hosny Jun 15 '12 at 1:37
up vote 2 down vote

I got bitten by the same bug today, and there was indeed a circular include in the file:

<include ignore_missing="yes">/home/rpinson/.config/font-manager/local.conf</include>

Commenting it out solved the issue.

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