GtkCellRenderer g_object_set crush if multiple columns defined - gtk3

Question

I want to set style to combobox item. Tried to use css - not working.
So I tried to set properties directly via g_object_set.
In case of object gtk_list_store_new(1, G_TYPE_STRING); all goes fine and styles applied. But if gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_STRING); app crushes on g_object_set.
Code:
GError * error =0;
GtkComboBox* cb = GTK_COMBO_BOX(widget);
// GtkListStore *store = gtk_list_store_new(2, GDK_TYPE_PIXBUF, G_TYPE_STRING);
GtkListStore *store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
GtkTreeIter iter;
gtk_list_store_insert_with_values(GTK_LIST_STORE(store), &iter, -1, 0, "Netherlands",1, "Netherlands", -1);
gtk_list_store_insert_with_values(GTK_LIST_STORE(store), &iter, -1, 0, "Japan",1, "Netherlands", -1);
gtk_combo_box_set_model(cb, GTK_LIST_STORE(store));
GtkCellRendererText* cell = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(cb), cell, TRUE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(cb), cell, "text", 0, NULL);
GtkCellRendererText* cell2 = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(cb), cell2, TRUE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(cb), cell2, "text",1, NULL);
g_object_set(cell, "font", "Proxima Nova Rg 15");
g_object_set(cell, "foreground", "#a5adbe");
g_object_set(cell, "background", "#ffffff");
g_object_unref(store);
Stack trace:
strstr()
?? ()
g_object_set_valist()
g_object_set
Code is executed on realize signal of combobox
Thanks in advance!

Answer 1

When I've found cell-background property in docs, it became obvious that I am using wrong properties. But it will not work alone, you have to specify cell-background-set" = TRUE as I found here. Now it completely works for me - backgrounds, fonts, all set as needed.
My working code:
G_MODULE_EXPORT void on_countries_show(GtkWidget* widget, gpointer user_data)
{
GError * error =0;
GtkComboBox* cb = GTK_COMBO_BOX(widget);
GtkListStore *store = gtk_list_store_new(2, GDK_TYPE_PIXBUF, G_TYPE_STRING);
GtkTreeIter iter;
int h = gtk_widget_get_allocated_height(widget);
h = 18;
GdkPixbuf *nl = gdk_pixbuf_new_from_file_at_scale ("flags/NL.png", h, h, TRUE, &error);
GdkPixbuf *jp = gdk_pixbuf_new_from_file_at_scale ("flags/JP.png", h, h, TRUE, &error);
gtk_list_store_insert_with_values(GTK_LIST_STORE(store), &iter, -1, 0, nl, 1, "Netherlands", -1);
gtk_list_store_insert_with_values(GTK_LIST_STORE(store), &iter, -1, 0, jp, 1, "Japan", -1);
gtk_combo_box_set_model(cb, GTK_LIST_STORE(store));
GtkCellRenderer* pb = gtk_cell_renderer_pixbuf_new();
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(cb), pb, TRUE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(cb), pb, "pixbuf",0, NULL);
GtkCellRenderer* cell = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(cb), cell, TRUE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(cb), cell, "text", 1, NULL);
g_object_set(pb,
"cell-background", "white",
"cell-background-set", TRUE,
NULL);
g_object_set(cell,
"font", "Proxima Nova Rg 15",
"background", "white",
"foreground", "#a5adbe",
"cell-background-set", TRUE,
NULL);
g_object_unref(store);
}
If anybody will stuck like me - you are welcome ;-)