Re: RMCL 5.2 on Snow Leopard: floating point issues

I thought the "MCL developers" were us!

I get the same float problem (Mac Pro 2009, MacOS 10.6.1, RMCL 5.2b6).
I loaded the patches in 
<http://code.google.com/p/mcl/source/detail?r=ff3f7eb878e5d61e1a8e83f6d19b3a3ea86de346>
but no fix of this float bug.

I also get curious behavior on file & directory 
opening dialogs, slow, often very slow, and on 
some occasions a complete hang (spinning 
beachball).
Also directory contents sometimes missing in List 
view (I have to climb back up the directory 
hierarchy to get visible contents).

At 2:06 PM +0800 09/10/16, Chun Tian wrote:
>Hi, Alexander
>
>Thanks, this time I can reproduce the bug too.
>
>Let's see how MCL developers handle this issue.
>
>--binghe
>
>çð 2009-10-16ÅC13:58ÅC Alexander Repenning é ì¼ÅF
>
>>  The problem manifests itself with returning every float value as 0.0 
>>  which is a likely source of causing division by zero float error.
>>
>>  I still do not know what causes this problem. There is no obvious CL 
>>  code that could explain this. However, there is good news, or at 
>>  least good enough news. I can now replicate the bug. Tracking the 
>>  bug in a large code base finally turned up this unlikely culprit:
>>
>>  Welcome to Macintosh Common Lisp Version 5.2!
>>  ? 3.3
>>  3.3
>>  ? (choose-directory-dialog)
>>  #P"Double Ristretto:Users:alex:Desktop:RMCL 5.2:level-1:"
>>  ? 3.3
>>  0.0
>>  ?
>>
>>  OS X 10.6.1, Core 2 Duo, 2.6 Ghz MacBook Pro with a fresh copy of 
>>  RMCL from Google Code.
>>
>>  time to sleep...
>>
>>  Alex
>>
>>
>>
>>  On Oct 15, 2009, at 9:30 PM, Chun Tian wrote:
>>
>>>  Hi again,
>>>
>>>>  (this is in a Listerner 1 process "initial" breaking after the error
>>>>  occurring for the first time resulting in float /0 errors)
>>>
>>>  What does above mean? I try to eval something like (/ 1.0 0.0) first,
>>>  but the rest of those float tests are still keep the same.
>>>
>>>  --binghe
>>>
>>>  çð 2009-10-16ÅC11:26ÅC Chun Tian é ì¼ÅF
>>>
>>>>  Hi, Alexander
>>>>
>>>>  Hmmm ... I'm also in Snow Leopard using RMCL 5.2, but your tests are
>>>>  all fine here:
>>>>
>>>>  Welcome to Macintosh Common Lisp Version 5.2!
>>>>  ? 3
>>>>  3
>>>>  ? 3.0
>>>>  3.0
>>>>  ? *read-default-float-format*
>>>>  SINGLE-FLOAT
>>>>  ? (setq *read-default-float-format* 'short-float)
>>>>  SHORT-FLOAT
>>>>  ? 3
>>>>  3
>>>>  ? 3.3
>>>>  3.3
>>>>  ? (float 3)
>>>>  3.0
>>>>  ? (+ 4.5 5.5)
>>>>  10.0
>>>>  ?
>>>>
>>>>  This is Mac OS X 10.6.1 on Intel Core 2 Duo 2.66GHz (MacBookPro5,2).
>>>>  I just want to clarify that not everyone met the same issue as you
>>>>  (I'm sorry for that).
>>>>
>>>>  Regards,
>>>>
>>>>  Chun Tian (binghe)
>>>>
>>>>  çð 2009-10-16ÅC4:38ÅC Alexander Repenning é ì¼ÅF
>>>>
>>>>>  getting closer to WHAT is happening but not WHY. Keep in mind this
>>>>>  worked on Leopard but not Snow Leopard. I would assume this is has
>>>>>  something to do with the new version of Rosetta. Here are some
>>>>>  stunning listener interactions (this is in a Listerner 1 process
>>>>>  "initial" breaking after the error occurring for the first time
>>>>>  resulting in float /0 errors):
>>>>>
>>>>>  1 > 3
>>>>>  3
>>>>>  ;; OK
>>>>>  1 > 3.0
>>>>>  1.06099791E-315
>>>>>  ;; HUH!!!
>>>>>
>>>>>  1 > (setq *read-default-float-format* 'short-float)
>>>>>  SHORT-FLOAT
>>>>>  1 > 3
>>>>>  3
>>>>>  1 > 3.3
>>>>>  0.0
>>>>>  1 > (float 3)
>>>>>  0.0
>>>>>  1 > (+ 4.5 5.5)
>>>>>  0.0
>>>>>
>>>>>  Looks as if ANY kind of float returned is a 0.0
>>>>>
>>>>>  Meanwhile, in the regular listerner things are still working as
>>>>>  expected.
>>>>>
>>>>>  I am stumped at the moment and would appreciate any pointer or even
>>>>>  wild guesses on how RMCL could possibly enter this state.
>>>>>
>>>>>  So far I have only seen the problem in process initial but I am not
>>>>>  sure if this is relevant.
>>>>>
>>>>>  all the best,  Alex
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>  On Oct 14, 2009, at 2:57 PM, Terje Norderhaug wrote:
>>>>>
>>>>>>  On Oct 14, 2009, at 9:15 AM, Alexander Repenning wrote:
>>>>>>>  What kinds of  issues do people have out there with RMCL 5.2 and
>>>>>>>  Snow Leopard (OS X, 10.6.1)?
>  >>>>>>
>>>>>>>  Things almost work here but there are some strange floating point
>>>>>>>  issues (with shorts).
>>>>>>>
>>>>>>>  At least we get further, ironically, with RCML 5.2 than CCL 1.3
>>>>>>>  which immediately quits. What is the version of CCL one should 
>>>>>>>  use
>>>>>>>  to work under OS X 10.6.1?
>>>>>>
>>>>>>  Are these the same as the problems discussed in issue 8 at
>  >>>>> mcl.googlecode.com?
>>>>>>
>  >>>>> http://code.google.com/p/mcl/issues/detail?id=8
>>>>>>
>>>>>>  Gary made some changes to the floating point functionality, but 
>>>>>>  come
>>>>>>  to think about it, these changes may not have been propagated into
>>>>>>  the distribution yet:
>>>>>>
>  >>>>> http://code.google.com/p/mcl/source/detail?
>  >>>>> r=ff3f7eb878e5d61e1a8e83f6d19b3a3ea86de346
>>>>>>
>>>>>>  -- Terje
>  >>>>> _______________________________________________

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