Re: LuaJIT optimization bug?

[Pierre Chapuis <catwell@...>]

On Wed, 17 Aug 2011 16:02:18 +0200, Pierre Chapuis wrote:

> That's the problem: every single line I change in the code gives
> a different behavior, even defining one more / less local. So
> it's almost impossible to reduce to a snippet...

To give you an idea of the butterfly effect I face:

  -- incorrect result
  bit_set_1(_bset,_byte,_bit)

  -- incorrect result
  bit_set_1(_bset,_byte,_bit)
  assert(true)

  -- incorrect result
  bit_set_1(_bset,_byte,_bit)
  assert(true)
  assert(true)

  -- correct result (!)
  bit_set_1(_bset,_byte,_bit)
  assert(true)
  assert(true)
  assert(true)

  -- incorrect result (!!!)
  bit_set_1(_bset,_byte,_bit)
  assert(true)
  assert(true)
  assert(true)
  assert(true)

So trying to make a snippet that reproduces that bug is worse than
hunting a needle in a haystack.

--
Pierre 'catwell' Chapuis