GLib-GObject-WARNING **: invalid cast from `GtkSpinButton' to `SPWidget' (trunk >= r11868)

[su_v]

For each digit entered into the zoom widget at the right end of status bar, this warning is printed to the console:

GLib-GObject-WARNING **: invalid cast from `GtkSpinButton' to `SPWidget'

As far as I can tell the warning is harmless, but it's irritating nevertheless ;)

Reproduced with current trunk (r11868 - r11950) on
- Mac OS 10.5.8 (glib2 2.28.8)
- OS X 10.7.4 (glib2 2.32.4, 2.34.3)
- Ubuntu 12.10 (glib2 2.34.0)

Not reproduced with <= r11867 and with current stable on all mentioned systems.

Likely related to this change:
revision 11868 “Replace remaining C-style pointer casts for src/widgets”
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/11868#src/widgets/desktop-widget.cpp>

[su_v (suv-lp)]

@Alex - maybe you could take a look at this?

[jazzynico (jazzynico)]

Confirmed on Debian testing, Inkscape trunk revision 11950.

[Alex Valavanis (valavanisalex)]

Ah... this kind of thing makes me glad I replaced the C-style pointer casting :-)

The GObject pointer cast macros perform runtime type-checking of objects so it reveals places such as this where we were doing something dodgy all along.

Anyway, I've fixed this in lp:inkscape r11951. We should keep our eyes open for other similar runtime warnings that have been revealed since the type-checking was introduced.