I get stack error on Jqt.  It's simply an infinite recursion, which should be detected properly.  Recently someone else reported something like this & the problem turned out to be that their JQt was old.  Can you make sure you are running the latest JQt version?

Henry Rich

On 1/25/2020 9:33 AM, Jan-Pieter Jacobs wrote:
Good afternoon.
While trying to find a way to have an adverb returning a dyad, I just found
this example that crashes JQT immediately:

    aae =: 1 : ('0 u $:';':';'([: u {)`[`]}')
    + aae
0 + $: NB. so far so good
    + aae 'abc'

crashes JQT with the following message in the console I launched jqt from:
/jqt.sh: line 8:  9295 Segmentation fault      (core dumped) bin/jqt

However, Jconsole just returns a stack error.

    JVERSION
ngine: j901/j64avx/linux
Release-d: commercial/2020-01-20T11:34:28
Library: 9.01.20
Platform: Linux 64
Installer: J901 install
InstallPath: /home/jpjacobs/j901
Contact: www.jsoftware.com

Best regards,
Jan-Pieter
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