Re: obscure luatex error

[luigi scarso <luigi.scarso@gmail.com>]

On Thu, Oct 15, 2009 at 4:09 PM, Matthijs Kooijman <matthijs@stdin.nl> wrote:
> Hi,
>
>> luatex: ../../../source/texk/web2c/luatexdir/tex/printing.c:266: print:
>> Assertion `c < 256' failed.
>> [329.327MTXrun | fatal error, no return code, message: luatex: execution
>> interrupted
>
> A quick glance at the code, shows it's in the following part:
>
>  /*
>  An entire string is output by calling |print|. Note that if we are outputting
>  the single standard ASCII character \.c, we could call |print("c")|, since
>  |"c"=99| is the number of a single-character string, as explained above. But
>  |print_char("c")| is quicker, so \TeX\ goes directly to the |print_char|
>  routine when it knows that this is safe. (The present implementation
>  assumes that it is always safe to print a visible ASCII character.)
>  @^system dependencies@>
>
>  The first 256 entries above the 17th unicode plane are used for a
>  special trick: when \TeX\ has to print items in that range, it will
>  instead print the character that results from substracting 0x110000
>  from that value. This allows byte-oriented output to things like
>  \.{\\specials} and \.{\\pdfliterals}. Todo: Perhaps it would be useful
>  to do the same substraction while typesetting.
>  */
>
>  void print(integer s)
>  {                               /* prints string |s| */
>  ...
>              } else if (s >= 0x110000) {
>                  int c = s - 0x110000;
>                  assert(c < 256);
>                  print_char(c);
>              } else {
>  ...
>  }
>
> It seems the second comment block talks about the code in which the error
> occurs. It also seems that this is either caused by some very high unicode
> character that's printed, or some invalid (uninitialized?) value is passed to
> print().
>
> Do you think you could compile luatex with CFLAGS=-g, and run it in gdb to get
> a backtrace? That might help to see where this comes from...

changing
STRIP_LUATEX=TRUE
in
STRIP_LUATEX=FALSE
in build.sh isn't enough ?

-- 
luigi
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