Re: math package floating point exceptions

["Alex Davies" <alex.mania@...>]

Hi James,

What that means is that your host app has floating point exceptions enabled. 
By default, the fpu should just produce propagating NaNs and Infs. Perhaps 
you're running inside Delphi or similar? Anyway, to disable floating point 
exceptions.

On an x86 where __asm{} allows you to type assembler, this'll do it:

__asm {
 finit;
}

(Reinitializes the fpu to its default state)

Then your application will run this app:
print(math.asin(5))
The same as the lua standalone, that is, it'll print NaN;

----- Original Message ----- 
From: "James Walker"

> When Lua is used on Windows, floating point exceptions can crash the host 
> application.  I suggest adding some error checks, something like this: