bugGNU Octave - Bugs: bug #55184, Interpreter tries to obtain...


bug #55184: Interpreter tries to obtain user_code_value from oct-file.

Submitted by:  Kai Torben Ohlhus <siko1056>
Submitted on:  Sat 08 Dec 2018 12:36:46 AM UTC  
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Regression
Status:  Fixed Assigned to:  Kai Torben Ohlhus <siko1056>
Originator Name:  Open/Closed:  Closed
Release:  dev Operating System:  GNU/Linux

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Sat 08 Dec 2018 12:39:50 AM UTC, comment #1: 
Kai Torben Ohlhus <siko1056>
Project MemberIn charge of this item.
Sat 08 Dec 2018 12:36:46 AM UTC, original submission:  

The problem has an easy fix and was introduced with cset https://hg.savannah.gnu.org/hgweb/octave/rev/2eb71b83d3e2#l8.14

There a line was removed and not restored, that ensured the function to exist and contain user_code:

if (fcn.is_defined () && fcn.is_user_code ())

The bug can be triggered with the attached files (bug.zip) by calling the function "problem" TWICE.  This will overwrite an existing oct-file and will cause a pointless error by calling an inappropriate function:

error: octave_base_value::user_code_value(): wrong type argument 'dynamically-linked function'
error: called from
    problem>do_sub at line 26 column 1
    problem at line 22 column 1

I will go ahead an restored that line, as it caused no other damage.  Maybe there should be a regression test, but I cannot imagine one yet.

Kai Torben Ohlhus <siko1056>
Project MemberIn charge of this item.


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Attach Files:

Attached Files
file #45594:  bug.zip added by siko1056 (2KiB - application/zip)


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-12-08 siko1056 StatusIn Progress => Fixed
        Open/ClosedOpen => Closed
    2018-12-08 siko1056 Attached File- => Added bug.zip, #45594

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