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bug#23260: (wxmaxima) crash: GLib-GIO-ERROR **: Settings schema 'org.gtk

From: Danny Milosavljevic
Subject: bug#23260: (wxmaxima) crash: GLib-GIO-ERROR **: Settings schema 'org.gtk.Settings.FileChooser' is not installed
Date: Thu, 5 May 2016 17:59:00 +0200

In glib-2.46.1/gio/gsettingsschema.c there's a function 
"initialize_schema_sources" which is responsible for initializing the schema 

It uses g_get_system_data_dirs() and traverses the result (which are supposed 
to be names of directories), and it checks an environment variable 
GSETTINGS_SCHEMA_DIR for the name of ONE directory; the basename of the regular 
file searched for is called "gschemas.compiled".


$ export 

makes it work. However, that can't be the right fix. Among other things, one 
can only specify a single directory that way. Also, the average user probably 
doesn't even know what glib schemas are.

If that is fine anyway (why?), there seems to be already an environment 
variable "GTK_PATH" set by guix, so auto-setting

$ export GSETTINGS_SCHEMA_DIR="${GTK_PATH}/../../share/glib-2.0/schemas"

should make it work for the time being.

I don't think this bug is specific to wxmaxima. I suggest to retitle it "Gtk3 
FileChooser doesn't work - it doesn't find its settings" or something.

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