Lua error on unailable fonts

Lua error on unailable fonts

[Matthijs Kooijman]

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Hi,

after upgrading to the latest context beta, I'm fased with the following lua
error:

  define font | forced type otf of lmmono8-regular not found
  define font | font with name lmmono8-regular is not found
  [...]
  ! LuaTeX error /usr/share/texmf/tex/context/base/math-vfu.lua:366: table index
  is nil
  stack traceback:
          /usr/share/texmf/tex/context/base/math-vfu.lua:366: in function
          </usr/share/texmf/tex/context/base/math-vfu.lua:261>
          (tail call): ?
          (tail call): ?
          /usr/share/texmf/tex/context/base/font-def.lua:549: in function 'read'
          /usr/share/texmf/tex/context/base/font-ctx.lua:359: in function 'command_2'
          <main ctx instance>:1: in main chunk.

Apparently there is still some font cache somewhere that's not updated, and
context says it has a font that is not found. However, a bit further down,
this crashes.

The cause of this is that the "nullfont" is returned as defined in
font-ini.lua, not just nil:

  fonts.ids[0] = { -- nullfont
      characters   = { },                                                        
      descriptions = { },                                                        
  }

This font has no name, but math-vfu.lua uses fs.name unconditionally. Either
math-vfu.lua should be fixed to test for this, or a line should be added to
the null font above:

  name = "",

I've tested the latter, and it solves my immediate problem.

Gr.

Matthijs

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___________________________________________________________________________________

Re: Lua error on unailable fonts

[Hans Hagen]

Matthijs Kooijman wrote:
> Hi,
> 
> after upgrading to the latest context beta, I'm fased with the following lua
> error:
> 
>   define font | forced type otf of lmmono8-regular not found
>   define font | font with name lmmono8-regular is not found
>   [...]
>   ! LuaTeX error /usr/share/texmf/tex/context/base/math-vfu.lua:366: table index
>   is nil
>   stack traceback:
>           /usr/share/texmf/tex/context/base/math-vfu.lua:366: in function
>           </usr/share/texmf/tex/context/base/math-vfu.lua:261>
>           (tail call): ?
>           (tail call): ?
>           /usr/share/texmf/tex/context/base/font-def.lua:549: in function 'read'
>           /usr/share/texmf/tex/context/base/font-ctx.lua:359: in function 'command_2'
>           <main ctx instance>:1: in main chunk.
> 
> Apparently there is still some font cache somewhere that's not updated, and
> context says it has a font that is not found. However, a bit further down,
> this crashes.
> 
> The cause of this is that the "nullfont" is returned as defined in
> font-ini.lua, not just nil:
> 
>   fonts.ids[0] = { -- nullfont
>       characters   = { },                                                        
>       descriptions = { },                                                        
>   }
> 
> This font has no name, but math-vfu.lua uses fs.name unconditionally. Either
> math-vfu.lua should be fixed to test for this, or a line should be added to
> the null font above:
> 
>   name = "",
> 
> I've tested the latter, and it solves my immediate problem.

i fixed it but that probably does not solve your missing font problem

Hans


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________