Re: ANN: updated yield patch for 4.0

[Kenneth Gangstoe <kennethg@...>]

Very nice!

Just wondering; are anyone currently looking into yield and 4.1? Or will this
be part of the official source?

- Kenneth

Quoting Thatcher Ulrich (tu@tulrich.com):
> I fixed a few bugs in the yield patch.  Big thanks to Roberto I. and
> Arvid Norberg for the bug reports.  See
> http://www.lua-users.org/wiki/LuaPowerPatches for the current version
> of the patch.
> 
> Summary of bugs fixed:
> 
> 	> _ERRORMESSAGE = function (x) print(x) end
> 	> a = a+1
> 	attempt to perform arithmetic on global `a' (a nil value)
> 
> [previously, this would hang or seg fault]
> 
> 	> function my_func() yield() end
> 	> my_func() if (nil > nil) then end
> 
> [previously, this would hang or seg fault]
> 
> 	program.lua:
> 		function foo() a=a+1 end	-- a is nil; will cause error
> 		foo()
> 
> 	# lua program.lua
> 
> [previously, the stack backtrace from the error would possibly lack
> line numbers, and lua would hang or seg fault]
> 
> There is still at least one bug surrounding error handling.  For example,
> if you do:
> 
> 	> dofile("program.lua")
> 
> from an interactive session, and program.lua does a yield(), then lua
> may seg fault.
> 
> Since I only have limited time to work on this, I figured I'd release
> the bug fixes so far.  More bug reports, and especially patches or
> insight, are greatly appreciated.
> 
> -- 
> Thatcher Ulrich <tu@tulrich.com>
> http://tulrich.com