Re: [NTG-context] Bug: Segmentation fault

11 Dec 2019

      On Wed, Dec 11, 2019 at 12:10 AM Hans Hagen  wrote:
...
On 12/11/2019 12:03 AM, luigi scarso wrote:
...
On Tue, Dec 10, 2019 at 9:27 PM Henri Menke mailto:henrimenke@gmail.com> wrote:
Dear devs,
The example below crashes LuaTeX with a segmentation fault.  It is
    reproducible
    with LuaTeX 1.10.1 7143 and LuaTeX 1.11.2 7226.  To this end I built
    7226 from
    source with --debugopt to get a backtrace, which can be found below
    as well.
Cheers, Henri
---
\directlua{token.set_macro(-1, "foo","\string\\,")}
    \show\foo
    \foo
    \bye
I guess that we have to check if catcodetable -1 is already defined...
i already sent you a patch, probbaly also ok for trunk
yes, seen
...
but one needs to be careful as fo rinstance \string\foo is seen as
<formfeed>oo so often one also needs to escape properly
I always start with  [==[ ... ]==]  ie
\directlua{token.set_macro(-1, [==[foo]==],[==[\string\\,]==])}
 gdb reports this [==[\string\\,]==] string as
 "\\\\,"
which is an array of char of length 3 ie {'\\','\\',','}

With \directlua{token.set_macro(-1, [==[foo]==],"\string\\,")}
gdb reports "\\,"
ie {'\\','\,'}

I always check which one is the correct one...

-- 
luigi