Odd result with verb display Foreign (9!:2)

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Joshua Y

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Jan 14, 2026, 1:40:36 AM (2 days ago) Jan 14
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I'm not sure when this changed, but querying verb display Foreign is not returning "an integer list with numbers selected from 1 2 4 5 6" as per the docs

    (9!:3) 5
    (9!:2) ''
_4647714815446350587

Trying the same thing on the Playground works as expected
   (9!:3) 5
   (9!:2)''
5

Raul Miller

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Jan 14, 2026, 8:01:54 AM (2 days ago) Jan 14
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Which version of J was this?

(As an aside, it looks like you can use 256|9!:2 as a workaround, though that's not ideal.)

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Raul

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Henry Rich

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Jan 14, 2026, 8:33:55 AM (2 days ago) Jan 14
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Fixed for next beta, thanks.  I continually have to wring space out of the main control block, and I got this wrong.

Henry Rich
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