ar =: 1 : '5!:1 <''u'''
[ `(1 ar)`]
┌─┬─────┬─┐
│[│┌─┬─┐│]│
│ ││0│1││ │
│ │└─┴─┘│ │
└─┴─────┴─┘
[ `(1 ar)`]}
[`1`]}
The above is a user error. Spec for } requires middle tine to be a verb such
as: [`1:`]}
this is possibly a lr error,
[`1`]
|domain error
| [`1`]
[`1`]}
|domain error
| [`1`]}
but the following will crash J (804 or 805, qt windows 64bit)
3 [`(1 ar)`]} i.5
even though its hard to accidentally insert a noun into a gerund with `, user
conjunctions can make it easier to build gerund of mixed types. Perhaps it is
worthwhile for },@.,^: to check for verb within gerund, or if the cost is the
same, to automagically use N"_
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