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I already have LUA_USE_APICHECK defined in the current release builds from tracking down some other crash bugs in the last couple of weeks. This luaD_precall crash seems to be the last one.

I'm considering patching Lua temporarily to check if f is NULL, and if so kill the process in such a way that as well as a backtrace, I also get something useful like the last Lua statement that was being evaluated, but I'm not sure which API calls would be appropriate at that point in luaD_precall().


On 17 April 2018 at 22:42, Luiz Henrique de Figueiredo <> wrote:
If you can, rebuilt Lua with LUA_USE_APICHECK on. It may help locate
the problem.