dissect error on open with fit

[Jörg Sommrey]

Hello all,

when opening boxed lists of boxed strings and providing a pad atom
using Fit, the resulting sentence cannot be dissected:

>!.(<' ') (<'ab'; 'cd'; 'ef'), (<'gh'; 'ij')

│ab│cd│ef│

│gh│ij│ │


Dissect output:
| Dissect's result from running the sentence did not match the result
from running the sentence in the J session. There are 3 possible
reasons:
|
| 1. Your sentence is irreproducible, because it uses random numbers
(the ? verb) or inconstant external data, or it has side effects.
|
| 2. The J interpreter has a bug executing your code that does not
show up when executing Dissect's sentence, which is slightly different.
|
| 3. Dissect has a bug.
|
| Do you want Dissect to display its result anyway?

Tested on j9.6.3 and with Juno on j9.8.0-beta1

It looks a bit like the third case.

Best regards,
-jo