Re: [lmi] GTK warnings

[Greg Chicares]

On 7/1/22 15:16, Vadim Zeitlin wrote:
> On Thu, 30 Jun 2022 19:47:11 +0000 Greg Chicares <gchicares@sbcglobal.net> 
> wrote:
[...]
> GC> (lmi_wx_shared:79710): Gtk-WARNING **: 19:32:24.395: Drawing a gadget 
> with negative dimensions. Did you forget to allocate a size? (node tab owner 
> GtkNotebook)
> 
>  I don't see this one, using GTK 3.24.34. Could you please tell me what do
> I need to do to see it?

To reproduce:
  File | New | Illustration
  OK
That gives me ten instances of the warning quoted above, followed by
one instance of the one below:

> GC> (lmi_wx_shared:79710): Gtk-CRITICAL **: 19:32:24.402: 
> gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar

I don't think we should suppress all GTK diagnostics...

>  Calling GTKSuppressDiagnostics() would be trivial, of course, if you're
> ready to do it.

...because someday we might actually get one that's not merely noise.

I have very much the same experience with 'meld'. For example:

  $meld /srv/chroot/lmi_bookworm_5/opt/lmi/free/src/lmi 
/srv/chroot/lmi_bookworm_5/opt/lmi/src/lmi 2>&1 |less

elicits a very large number of lines like this:

  2022-07-01 15:45:47,481 CRITICAL Gtk: gtk_widget_get_scale_factor: assertion 
'GTK_IS_WIDGET (widget)' failed

Attempting to capture them all in a file, like this:

  >eraseme 2>&1

fails, producing a zero-byte file. I have the impression that
GTK might be sending messages to someplace like /dev/tty .
Piping into 'less' as above, I see a screenful of those messages,
but if I try scrolling 'less', they all vanish. It's still useful
to pipe into 'less' because it provides a place for messages to go
instead of filling up my terminal scrollback buffer, but then I
still have to quit 'less', so lately I've been running
   meld ...arguments... 2>&1 >/dev/null &

It's been this way with 'meld' since approximately forever.
Maybe the only reason I don't see those messages with other GUI
apps is that I launch them from xfce menus.

My conclusion is that these GTK messages might be useful if they
indicate actual problems in code I write, to the extent that it's
possible to fix them; but otherwise, GTK is just defectively noisy.