It sounds like you are saying that the current implementation of f. is
where the problem is.
Conceptually, there will be intermediate results somewhere which are
malformed. And I guess that identifying those are what makes this
difficult.
It has bothered me for years that the 5!:5 representation of
multi-line explicit definitions is not suitable for use by ".
expressions, and also cannot be nested inside other explicit
definitions -- I keep wanting a 5!:something that instead gives a
boxed representation for those explicit definitions.
Maybe, for now, just throw a nonce error instead of trying to nest
multi-line explicit definitions? If this is what I think it is, the
proper solution for this issue would need -- let's call it 5!:7 -- a
linear representation which is very much like 5!:5 except that
5!:7<'s' would produce something like '4 :(''0'';''0'')' instead of
52 32 58 32 48 10 48 10 48 10 41{a. (which gives the 5!:5 result).
Thanks,
--
Raul
On Thu, May 14, 2020 at 5:57 PM Henry Rich <[email protected]> wrote:
>
> This may be hard to fix. I have added it to the crash list. The problem
> boils down to:
>
> Setup:
> s =: 4 : 0
> 0
> 0
> )
> i =: 0&$: : s
>
> Now:
> i&> f.
> 3 : 0 :(4 : 0)&>
> x 0&$: :(4 : 0)
> 0
> 0
> ) y
> )
> 0&$: :(4 : 0)
> 0
> 0
> ) y
> )
>
> This is a malformed result and will hang waiting for input if you
> execute it.
>
> You got there because you executed
>
> ((setdiag_mt_~ ;&_1)~ idmat_mt_@#)&>/@}:
>
> on a scalar (which was given in a catch.), which executed u/ on an empty
> list, which looked for a neutral of u, which tried to execute
> (((setdiag_mt_~ ;&_1)~ idmat_mt_@#)&> f.)
> which failed as shown above.
>
> Henry Rich
>
>
>
> On 5/13/2020 4:01 AM, Igor Zhuravlov wrote:
> > Problem script is pasted below, it's a minimal version I was able to
> > achieve.
> >
> > The session log from the clean install is:
> >
> > # start of session log
> > user2@host2:~/j901> ./jconsole.sh
> > load 'pacman'
> > 'update' jpkg ''
> > Updating server catalog...
> > Local JAL information was last updated: 13 May 2020 17:26:38
> > Installed addons are up to date, 115 addons are not yet installed.
> > The base library is up to date.
> > 'install' jpkg 'math/mt math/lapack2'
> > Installing 5 packages
> > Downloading general/misc...
> > Installing general/misc...
> > Downloading math/lapack2...
> > Installing math/lapack2...
> > Downloading math/misc...
> > Installing math/misc...
> > Downloading math/mt...
> > Installing math/mt...
> > Done.
> > Installed addons are up to date, 111 addons are not yet installed.
> > The base library is up to date.
> > JVERSION
> > Engine: j901/j64/linux
> > Release-e: commercial/2020-01-29T10:38:14
> > Library: 9.01.23
> > Platform: Linux 64
> > Installer: J901 install
> > InstallPath: /home/user2/j901
> > Contact: www.jsoftware.com
> > 9!:14 ''
> > j901/j64/linux/release-e/commercial/www.jsoftware.com/2020-01-29T10:38:14
> > load '~user/temp/hang.ijs'
> > testptsvE_mt_ (j./ 2 5 5 ?@$ 0) ; (j./ 2 5 3 ?@$ 0)
> > 0
> > 1
> > # hangs here, process was killed manually
> > # end of session log
> >
> > NB. === start of script ~user/temp/hang.ijs ===
> > load 'math/mt'
> > load 'math/lapack2'
> >
> > coclass 'mt'
> >
> > tmonad2=: 2 : 0
> > '`vgety vgeto vrcond vferr vberr'=. n
> > try. argy=. vgety y catch. argy=. _. end.
> > try. 't s'=. timespacex 'ret=. ' , m , ' argy' catch. t=. s=. ret=. _. end.
> > try. out=. vgeto ret catch. out=. _. end.
> > try. rcond=. y vrcond out catch. rcond=. _ end.
> > try. ferr=. y vferr out catch. ferr=. _. end.
> > try. berr=. y vberr out catch. berr=. _. end.
> > EMPTY
> > )
> >
> > dptsv=: 3 : 0
> > echo '0'
> > 'd e'=. y
> > echo '1'
> > assert. isreal_jlapack2_ d NB. hangs here
> > echo '2'
> > d ; e
> > )
> >
> > testptsvE=: 3 : 0
> > vvv=: ((setdiag_mt_~ ;&_1)~ idmat_mt_@#)&>/@}:
> > ('dptsv' tmonad2 (((diag ; _1&diag)@(0&{::))`]`0:`_1:`(1: vvv))) y
> > EMPTY
> > )
> > NB. === end of script ===
> >
> > --
> > Regards
> > Igor
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
>
>
> --
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
