bugGNU Octave - Bugs: bug #55258, Recursion in a script file causes...


bug #55258: Recursion in a script file causes a segmentation fault

Submitter:  Rob Frohne <frohro>
Submitted:  Thu 20 Dec 2018 10:14:22 PM UTC
Category:  Interpreter Severity:  4 - Important
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Fixed Assigned to:  None
Originator Name:  Rob Frohne Open/Closed:  * Closed
Release:  * dev Operating System:  * GNU/Linux
Fixed Release:  None Planned Release:  None
* Mandatory Fields

Add a New Comment (Rich Markup)

Comment Type & Canned Response:


( Jump to the original submission )

Wed 06 Feb 2019 05:41:32 PM UTC, comment #7: 

I don't see why it would need to be reopened, the bug is fixed. The fix was part of a major refactoring of Octave's call stack implementation and cannot be backported to Octave 5. If you need the fix for this you will need to wait for Octave 6 to be released next year.

Mike Miller <mtmiller>
Project Administrator
Wed 06 Feb 2019 04:47:20 PM UTC, comment #6: 

So should this be opened again?

Sun 03 Feb 2019 07:36:26 PM UTC, comment #5: 

Yes, this seems fixed on the default branch, but not on the stable branch for Octave 5.

Here is a modified version of Andy's test case (since pause triggers bug #55029 for me). It crashes immediately after the first key press on the stable branch, but properly recurses and hits the max_recursion_depth error check on the default branch.

(file #46172)

Mike Miller <mtmiller>
Project Administrator
Sun 03 Feb 2019 05:00:00 PM UTC, comment #4: 

I can still reproduce with 5.0.90, 903c9a39e051

Andreas Weber <andy1978>
Project Member
Sun 03 Feb 2019 03:38:28 PM UTC, comment #3: 

I just re-tested with the stable branch (about to become 5.1) and the development branch and this no longer causes a segfault.

Marking as fixed and closing report.

Rik <rik5>
Project Administrator
Sun 30 Dec 2018 09:26:11 PM UTC, comment #2: 

My testcase is file test2.m:


Looks like there is some overflow after calling octave::symbol_record::symbol_record_rep::varval 104339 times.

Backtrace attached

(file #45797)

Andreas Weber <andy1978>
Project Member
Fri 21 Dec 2018 07:39:02 PM UTC, comment #1: 


Noting that this is a script, not a function file. If I turn test2.m into a function file (simply wrapping the entire contents with 'function test2()' and 'endfunction'), it works as expected. When max_recursion_depth is hit, an error is raised and the whole thing returns.

Also noting that this is a regression from Octave 4.2. In Octave 4.2.2, script recursion works equally well and errors when it reaches max_recursion_depth as expected.

Mike Miller <mtmiller>
Project Administrator
Thu 20 Dec 2018 10:14:22 PM UTC, original submission:  

I have this script called test2.m below.  If I select the cancel button on the file dialog, it will cause a segmentation fault.  If I remove the recursive call to itself, it is fine.

switch (questdlg("Do you wish to load a calibration from disk?"));
case 'Yes'
  calFile = uigetfile();
  if calFile != 0
    load (calFile, 'fMin', 'fMax','nFreq', 'H1thru','H1iso');
  case {'No' 'Cancel'}

Rob Frohne <frohro>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #46172:  bug55258.m added by mtmiller (49B - text/x-objcsrc)
file #45797:  backtrace_55258.log added by andy1978 (8KiB - text/x-log)
file #45708:  test2.m added by frohro (257B - text/x-objcsrc)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -email is unavailable- added by rik5 (Posted a comment)
  • -email is unavailable- added by andy1978 (Updated the item)
  • -email is unavailable- added by frohro (Submitted the item)
  • -email is unavailable- added by frohro

    There are 0 votes so far. Votes easily highlight which items people would like to see resolved in priority, independently of the priority of the item set by tracker managers.

    Only project members can vote.





    Follow 11 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-02-03 mtmiller Attached File- Added bug55258.m, #46172
    2019-02-03 rik5 StatusConfirmed Fixed
        Open/ClosedOpen Closed
    2018-12-30 andy1978 Attached File- Added backtrace_55258.log, #45797
    2018-12-21 mtmiller CategoryNone Interpreter
        Severity3 - Normal 4 - Important
        StatusNone Confirmed
        Release4.4.1 dev
        SummaryRecursion causes a Segmentation Fault Recursion in a script file causes a segmentation fault
    2018-12-20 frohro Attached File- Added test2.m, #45708
        Carbon-Copy- Added -email is unavailable-

    Back to the top

    Powered by Savane 3.9