The error was a misplaced parenthesis.  It made the execution of u D. m liable to crashfor any u for which the derivative was known in closed form. Very surprising that it didn't fail any of our tests.

No workaround.  Fixed for next beta.

Henry Rich



On 10/20/2018 8:00 PM, Ian Clark wrote:
j807 crashes with the first sample phrase of the J Dictionary page:
    http://www.jsoftware.com/help/dictionary/ddcapdot.htm

    (cube D.1;cube D.2; (cube=: ^&3"0) D.3)y=: 2 3 4

J805 does not crash, but instead gives the expected result.

In jqt the effect is to make the Term window plus any other open jqt
windows vanish instantly. A few seconds later the standard Apple problem
report appears with "jqt quit unexpectedly".

With jconsole the result is a little more helpful…

Last login: Sun Oct 21 00:34:50 on ttys000
ian-clarks-imac:~ ianclark$ /Applications/j64-807/bin/jconsole ; exit;
OPEN loaded: 2018-10-21  00:38:21
scriptd_truncation: 2018-10-21  00:38:21
HANDY loaded: 2018-10-21  00:38:21
    JVERSION
Engine: j807/j64nonavx/darwin
Release: commercial/2018-10-05T11:56:35
Library: 8.07.19
Platform: Darwin 64
Installer: J807 install
InstallPath: /applications/j64-807
Contact: www.jsoftware.com
    (cube D.1;cube D.2; (cube=: ^&3"0) D.3)y=: 2 3 4
Segmentation fault: 11
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

Several other (D.) phrases crash too (sorry, haven't kept a list: the
nature of the error destroys the evidence).

Note my JVERSION ......... non-avx
I'm still running OSX El-Capitan Version 10.11.6 on an early-2009 iMac
because it's too old to be upgraded to Sierra or beyond.

Ian Clark
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