[Octave-bug-tracker] [bug #62222] Using optim and then ols causes hang (infinite loop)

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?62222>

                 Summary: Using optim and then ols causes hang (infinite loop)
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 27 Mar 2022 12:22:56 AM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Segfault, Bus Error, etc.
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: d0sboots@gmail.com
             Open/Closed: Open
                 Release: 6.4.0
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

In a *fresh* octave session, the following causes a hang:

octave:1> pkg load optim, ols([0;1;2],[0;1;2])


If I do the following, it works OK:

octave:1> ols([0;1;2],[0;1;2])
ans = 1
octave:2> pkg load optim, ols([0;1;2],[0;1;2])
ans = 1


This appears to affect virtually all uses of ols and other types of
regression, including the ones in the optim package. This is just the most
minimal repro.

I'm running Debian/testing.

$ dpkg -l octave octave-optim octave-parallel liblapack3 octave-struct
octave-statistics octave-io libxerces2-java default-jre-headless
libjopendocument-java
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                  Version      Architecture Description
+++-=====================-============-============-========================================================
ii  default-jre-headless  2:1.11-72    amd64        Standard Java or Java
compatible Runtime (headless)
un  libjopendocument-java <none>       <none>       (no description
available)
ii  liblapack3:amd64      3.10.0-2     amd64        Library of linear algebra
routines 3 - shared version
un  libxerces2-java       <none>       <none>       (no description
available)
ii  octave                6.4.0-2      amd64        GNU Octave language for
numerical computations
ii  octave-io             2.6.4-1+b1   amd64        input/output data
functions for Octave
ii  octave-optim:amd64    1.6.1-2+b1   amd64        unconstrained non-linear
optimization toolkit for Octave
un  octave-parallel       <none>       <none>       (no description
available)
ii  octave-statistics     1.4.3-2      all          additional statistical
functions for Octave
ii  octave-struct:amd64   1.0.17-3+b1  amd64        additional structure
manipulation functions for Octave





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