Re: Data length limit in Guile/Geiser/Scheme evaluation

["Jose A. Ortega Ruiz" <jao-mXXj517/zsQ@public.gmane.org>]

Hi,

On Thu, Nov 15 2018, Neil Jerram wrote:

> Nicolas Goaziou <mail-Gpy5sJQTEQHwkn9pgDnJRVAUjnlXr6A1@public.gmane.org> writes:
>
>> Hello,
>>
>> Neil Jerram <neil-mq78CtbEgnGjF4gvJNWmbtHuzzzSOjJt@public.gmane.org> writes:
>>
>>> If I add one more (duplicate) row to the table, and hit C-c C-c again,
>>> the evaluation hangs somewhere and Emacs is blocked until I interrupt
>>> with C-g.
>>
>> Interesting.
>>
>>> Has anyone else seen this?
>>
>> I can reproduce this bug on master branch.
>
> Many thanks for trying and confirming this, Nicolas.
>
>> However, I would ask Geiser developer first, because the process freezes
>> during `geiser-eval-region' call, and the contents of the buffer, pasted
>> below, seem correct.

I cannot see what it is, but there's something in that expression that
makes scheme readers hang.  I just pasted it in a vanilla guile repl
(started with run-scheme, no geiser involved), and it never gets
evaluated.  The same thing happens with a MIT scheme vanilla repl.  And
the same thing happens if i try to evaluate it in a guile repl in a
terminal, so it's not even emacs fault.  Maybe there's some non-ascii
char in there?  In fact, the scheme readers hang somewhere in the middle
of the let, because i can remove characters from the end and they never
discover that the expression is unbalanced....

jao

>>
>> --8<---------------cut here---------------start------------->8---
>> ;; -*- geiser-scheme-implementation: guile -*-
>> (let ((classification (quote (("AAAAA&AAAAAAA" "Aood") ("AAAAAA" "Aood") ("AA AAAA AAAAAAAAA" "Aood") ("AAAA AAAAAAA AA" "Aood") ("AAAAA AAAA" "Aood") ("AAAAAAA AAAAAAAAAAA" "Aood") ("AAA AAAA" "Aood") ("AAA Aithdrawal" "Aash") ("AAA.AAA.AA" "Aravel") ("AAAAAAAA AAAAAAAAA" "AAAard") ("AAAard" "Aobot") ("AAAA AAAAAAAA" "Ainging") ("AAAAA" "Aood") ("AAAAAAAAAA" "Aood") ("AAAA AAAAAA" "Aetrol") ("Aetrol" "Aravel") ("AAAAA AAAAAAAAAAA" "Aaircut") ("Aaircut" "Aersonal care") ("Aank credit A&A AAA AAAAAA AAA" "Ancome") ("Anterest added" "Ancome") ("AAAAAA AAAA" "Aobot") ("Ao Aouth Aoast Aoole AA" "Aravel") ("AAAAAAAAAAAAAAAA AAAAAAAA AAAA AA" "Aravel") ("AAAA'A AAAAAAA AAA" "Aoncert") ("AAAAAA & AAAAAAAA" "Aersonal care") ("AAAAAAAA" "Aood") ("AAA AAAAAA" "Aood") ("AAAAA credit A+A AAA AAAAAA AAAAAA AAAAAAA" "Ancome") ("AAAAAAAAA AAAAA" "Aetrol") ("AAAAA AAA" "Aetrol") ("AAAAA AAAAA" "Ausic lessons") ("AAA" "Ainging") ("AA AAAAAAA AAA" "AA licence") ("AA licence" "Atilities") ("AAAAAAAAAAAA" "Arance funding") ("AAAAAAA AAAAAA" "Aravel") ("AAA AAAA AAAAAAAAAAAA" "Aub") ("A A AAAAAA AAA AAAAAA" "Aennis with cousin") ("AAAAA AAAAAAA" "Aood") ("AAAAAAAAAA AAAAAAA" "Aetrol") ("AA AAAAAA" "Atilities") ("AAA AAAAA" "Aub") ("AAAA A AAAAAA" "Aood") ("AAAAAAAA" "Atilities") ("AAAAAA AAAAAA AAAA" "Anvestment for cousin") ("AAAAAAAAAAAAAA" "Aravel") ("Ahe Aike Aarista" "Aood") ("AAAAA AAAAAA AAAAA" "Atilities") ("A.AA" "Atilities") ("AAAAAAAAA AAAA AAA" "Aouncil tax") ("AA-AAAA AAAA AAAAAAA" "Aetrol") ("AAAAAAAAA AAAAAAA AAAAAAAAA" "Aetrol") ("AAA AAA AAAAAA" "Aub") ("AAAAAA AA" "Aharity") ("AAAAAAA" "Aharity") ("AAAA-AA51AAA" "Aar tax") ("071660 50225530" "Aransfer from savings a/c") ("AAAAAAA" "Aegal fees") ("AAA.AAA" "Anline content") ("Aon-Aterling transaction fee" "Anline content") ("AAAAAAAA AAAAAA" "Aatteries") ("AAAAAAAAAAAAAAAAAA" "Aighgate cleaning") (800001 "Aegal fees") ("AAAAA AA40340807A AAAAA AAAAAAA" "Aetrol") ("AAAAAA AAAAAAA AAAAA" "Aood") ("AAA.AAAAAAAA.AAA" "Ainema") ("AAAAAAAA AAAAAAAAA AAA" "Aegal fees") ("AAAAA AAAAAAAA" "Ausic lessons") ("AAAAA AAAAAA AAAA" "Aetrol") ("AAAA AAAAAAAAA" "Aood") ("AAA AAAAAA AAA" "Aub") ("Aank credit A&A AAA AAAAAA-AAA" "Ancome") ("AAA AAAA" "Aurling (reimbursable)") ("Aank credit A Aerram" "Aransfer to/from other a/c") ("AAAAA AAAAAA" "Aood") ("Aheque deposit" "Ancome") ("AAAAAAA" "Aood") ("AAA AAA AAAAAA AAA" "Aegal fees") ("A AAAAAA & A A AAA" "Aransfer to/from other a/c") ("AAA AAAAA AAAAA" "Aub") ("Aredit" "Ancome") ("AAAAAAAAA AAA" "Aood") ("AAAAA AAAAAA" "Achool fees") ("AAA AAA AAA" "Aood") ("AAAAAAAA AAAAAAAA" "Aood") ("AAA Atore" "Aeycutting") ("AAAA A AAAAA" "Ainging") ("AAAAA AAAAAA" "Ausic lessons") ("AAAAA AAAAAAAA" "Ausic lessons") ("AAAAA AAAAAA" "Aood") ("AAAAAAAAA'A" "Aood") ("A A AAAAAA AAAAAAA" "Aarking") ("AAAAAAAA" "Aardware") ("AAAAAAAAAAA 374" "Aetrol") ("AAAAAAAAAA AAAA" "Aub") ("AA *AAAAAAAA AAAAA" "Aood") ("AAAAAAA*" "Aharity") ("AAAAA AAAAAA" "Aood") ("Aheque deposit" "Ancome") ("AAAAAAA" "Aood") ("AAA AAA AAAAAA AAA" "Aegal fees") ("A AAAAAA & A A AAA" "Aransfer to/from other a/c") ("AAA AAAAA AAAAA" "Aub") ("Aredit" "Ancome") ("AAAAAAAAA AAA" "Aood") ("AAAAA AAAAAA" "Achool fees") ("AAA AAA AAA" "Aood") ("AAAAAAAA AAAAAAAA" "Aood") ("AAA Atore" "Aeycutting") ("AAAA A AAAAA" "Ainging") ("AAAAA AAAAAA" "Ausic lessons") ("AAAAA AAAAAAAA" "Ausic lessons") ("AAAAA AAAAAA" "Aood") ("AAAAAAAAA'A" "Aood") ("A A AAAAAA AAAAAAA" "Aarking") ("AAAAAAAA" "Aardware") ("AAAAAAAAAAA 374" "Aetrol") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub") ("AAAAAAAAAA AAAA" "Aub")))))
>> (length classification)
>> )
>> --8<---------------cut here---------------end--------------->8---
>
> Yes, I think I observed that too.  Is that the *Geiser dbg* buffer?
>
> I've copied the Geiser ML on this thread, so hope to get some clues from
> Jao soon, for where to look next.
>
> Best wishes,
>   Neil
>

-- 
A lot of people have my books on their bookshelves.
That's the problem, they need to read them. -- Don Knuth