[NTG-context] context (lmtx) segfaults on x86_64 linux

Hans Hagen j.hagen at xs4all.nl
Wed Sep 11 09:03:34 CEST 2019

On 9/11/2019 1:19 AM, Henri Menke wrote:
> On 9/11/19 3:50 AM, Aditya Mahajan wrote:
>> On Tue, 10 Sep 2019, Hans Hagen wrote:
>>> On 9/10/2019 4:11 PM, Vladimir Lomov wrote:
>>>> Hello,
>>>> today I updated lmtx and on simple
>>>>     $ context --version
>>>> I get segfault (in the same time luametatex --version works fine).
>>>> Running under gdb shows me that the problem might be in one of 'realloc'
>>>> calls.
>>>> The context from Context Suite (mkiv) works fine.
>>>> P.S. I tested on two systems, both runs Archlinux x86_64.
>>> can you completely wipe the texmf-cache directory and then run
>>> mtxrun --generate
>>> context --make
>>> (there is a change in bytecode that gets not automatically noticed that
>>> can give that crash)
>> I had the same issue and completely wiping the texmf-cache fixes it.
>> @Vladimir: If you are using the luametatex package from AUR, then the
>> texmf-cache is located at $HOME/.cache/luametatex.
> I'm receiving the super helpful error message:
>      ! error (lua): function call: no

there is not much context to present there as it means that deep down a 
bad function token is expanded, something under control of the macro 
package, which then has/is messed up

> Maybe some sort of cache versioning is in order to at least give a better error.

for now, adding

     \let\pdfsavepos \savepos

to cont-new.mkiv seems to work ok


                                           Hans Hagen | PRAGMA ADE
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