bugGNU Octave - Bugs: bug #48574, With GCC 6.x, an error in an...

 
 

bug #48574: With GCC 6.x, an error in an onCleanup function causes Octave to crash

Submitter:  John W. Eaton <jwe>
Submitted:  Wed 20 Jul 2016 11:28:45 PM UTC
 
Category:  Interpreter Severity:  5 - Blocker
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Fixed Assigned to:  jwe
Originator Name:  jwe Open/Closed:  * Closed
Release:  * dev Operating System:  * Any
* Mandatory Fields

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Fri 22 Jul 2016 04:28:29 PM UTC, comment #1: 

I checked in the following changeset:

http://hg.savannah.gnu.org/hgweb/octave/rev/63c806042c27

John W. Eaton <jwe>
Project Administrator
Wed 20 Jul 2016 11:28:45 PM UTC, original submission:  

GCC 6 now warns

../libinterp/octave-value/ov-oncleanup.cc: In destructor 'virtual octave_oncleanup::~octave_oncleanup()':
../libinterp/octave-value/ov-oncleanup.cc:92:7: warning: throw will always call terminate() [-Wterminate]
       throw;
       ^~~~~
../libinterp/octave-value/ov-oncleanup.cc:92:7: note: in C++11 destructors default to noexcept

and an error in an onCleanup function can trigger this problem.  The following is sufficient to demonstrate the bug:

function foo ()
  onCleanup (@() error ('oops!'));
end
foo

A possible fix is attached.

Maybe we should also display the message from the last error along with the new warning about an error in the cleanup function?

What does Matlab do for something like this?

John W. Eaton <jwe>
Project Administrator

 

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Attached Files
file #37966:  diffs.txt added by jwe (888B - text/plain)

 

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-07-22 jwe StatusPatch Submitted Fixed
        Open/ClosedOpen Closed
    2016-07-20 jwe Attached File- Added diffs.txt, #37966

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