Re: Lua 5.4 tests?

["Tony Papadimitriou" <tonyp@...>]

-----Original Message----- 
From: Roberto Ierusalimschy
> > TCC compiler:
> >
> > -DLUAI_MAXCSTACK=454 is the maximum I could have it complete all tests!
> > -DLUAI_MAXCSTACK=455 and above crashes.
> >
> > Microsoft compiler (VS2013):
> >
> > -DLUAI_MAXCSTACK=413 is the maximum I could have it complete all tests!
> > -DLUAI_MAXCSTACK=414 and above crashes.
> >
> > Tested on a Win7-64 machine with 6GB RAM (in case it matters).
> >
> > Both cases the values are far below the luaconf.h default of 2200
> Many thanks. This seems a remarkably small C stack for such a machine.
> Are you compiling Lua in debug mode or release mode?
>
> -- Roberto
I'm using whatever your defaults are.  I only added the above define for 
compilation.
Now, I ran cstack.lua with 5.3.5 and 5.4.0 compiled with the exact same 
compiler:
> lua -E -e"_U=true" cstack.lua
testing C-stack overflow detection
 maximum recursion: 999977
 maximum 'gsub' nest (calls): 197
 maximum 'gsub' nest (metamethods): 197
OK

> lua54 -E -e"_U=true" cstack.lua
testing C-stack overflow detection
 maximum recursion: 420
 maximum 'gsub' nest (calls): 35
 maximum 'gsub' nest (metamethods): 35
OK

cstack.lua refers to changing LUAI_MAXCCALLS which is the same (200) in both 
versions.
LUAI_MAXCSTACK does seem to be available in 5.3.5

Assuming the cstack.lua tests are valid also for 5.3.5, my guess from the 
above results is that it's not my system or compiler configurations but 
something in 5.4 is causing this dramatic reduction in maximum recursion. 
But, that's for you to decide.