Re: GLib-CRITICAL errors during build of docs (dev octave)

[Daniel J Sebald]

On 09/01/2017 06:16 PM, Mike Miller wrote:
> On Fri, Sep 01, 2017 at 16:00:11 -0700, Mike Miller wrote:
> > I think this is caused when multiple instances of Octave are generating
> > the plot figures concurrently, with make -jN. I can get these warnings
> > to go away with make -j1.
>
> Backing out changeset fb9b024a6041 makes these messages go away. But
> that change was meant to fix bug #50210. Did this change introduce
> another problem or are these messages safe to ignore? Does anyone know?

Yes, I think it is creating another problem.  The changeset looks like 
something I would have tried initially when attempting a robust exit 
sequence when the user selects "Exit" from the main GUI window while 
Octave-core is busy processing.  But terminate() and wait() don't work 
quite the way one would hope.  terminate() isn't graceful stoppage of 
the thread, instead it issues an error just as when Octave CLI were 
terminated.

The previous work is

https://savannah.gnu.org/bugs/?44485

In fact, Philip is the person I was working with on testing that, but 
unfortunately I never felt I handled all the various scenarios that 
could occur, e.g., user pressing exit several times in row, or 
Octave-core finally acknowledging it is complete while the "Should I 
force termination?" dialog box is on the screen.  (The dialog appeared 
after a two second timer expired.)

As I recall, my thinking at the time was to wait until Cntrl-C handling 
was all worked out because that would be the proper way to stop Octave 
if the user confirms "Yes, force termination" in the dialog box.  You'll 
probably want to backout this change, as I don't think it can be made 
robust.

For the documentation, I suppose using octave-cli as opposed to the GUI 
isn't possible because graphics_toolkit qt is needed:

sebald@ ~ $ octave-cli
GNU Octave, version 4.3.0+
[snip]
octave:1> graphics_toolkit qt
error: graphics_toolkit: qt toolkit is not available
error: called from
    graphics_toolkit at line 81 column 5
octave:1> graphics_toolkit fltk

Dan