[Octave-bug-tracker] [bug #54932] Segfault when starting GUI with -q

[Rik]

URL:
  <https://savannah.gnu.org/bugs/?54932>

                 Summary: Segfault when starting GUI with -q
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Thu 01 Nov 2018 09:14:31 AM PDT
                Category: GUI
                Severity: 5 - Blocker
                Priority: 5 - Normal
              Item Group: Regression
                  Status: Confirmed
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

On the dev branch, start Octave with


./run-octave -f -q --gui


Next, click on the Command Window and Octave segfaults.

Using hg bisect, this behavior was introduced in this cset


parent: 25988:976e7346abf4 
 Make gui command line mouse compatible for non-windows systems (bug #45003)
branch: default


The problem seems to be that when '-q' is used there are no lines in the
Command Window and so some count is either zero, or goes negative.  Without
'-q', Octave prints some generic help info which at least places something in
the Command Window buffer.







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