Gtk pixbuf errors on a mac

I’m running into tons of errors and warnings when using Gtk.jl functions on a mac. Things like pixbuf and “the installation is broken”. Any ideas what’s wrong?
I’m sorry about the vagueness, but this is happening in a users’ machine, so I don’t have enough access right now. Will be back with more details!

julia> using Gtk.ShortNames

(process:77126): Gtk-WARNING **: Locale not supported by C library.
	Using the fallback 'C' locale.

julia> open_dialog("a")

(<unknown>:77126): Gtk-WARNING **: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:gtkiconhelper.c:493:ensure_surface_for_gicon: assertion failed: (destination)

signal (6): Abort trap: 6
while loading no file, in expression starting on line 0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 2761386 (Pool: 2759981; Big: 1405); GC: 3

[Process completed]

I see the same without the locale warning

julia> using Gtk.ShortNames

julia> open_dialog("a")

(<unknown>:1538): Gtk-WARNING **: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:gtkiconhelper.c:493:ensure_surface_for_gicon: assertion failed: (destination)

signal (6): Abort trap: 6
while loading no file, in expression starting on line 0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 3038175 (Pool: 3036876; Big: 1299); GC: 3
Abort trap: 6

Maybe this will help? https://github.com/JuliaGraphics/Gtk.jl/issues/180#issuecomment-324194031

I’ll test this soon!

That solved the problem! Thanks!

I think that when you first install/build Gtk.jl there’s a warning (from Gtk) that tells you that the cache (loaders.cache) is not build correctly, and it gives you a command to run to fix it. I’m not sure where the issue originates from.

Possibly. Or, I’m sure you’re right. The issue arises from users that over look warnings and just drudge along (me for example).
Maybe the suggested fix can be part of the Gtk install.