Comment 2 for bug 1842439

StacktraceTop:
 _gtk_settings_get_screen (settings=0x0) at ../../../../gtk/gtksettings.c:3319
 gtk_css_value_icon_theme_compute (icon_theme=<optimized out>, property_id=<optimized out>, provider=<optimized out>, style=<optimized out>, parent_style=<optimized out>) at ../../../../gtk/gtkcssiconthemevalue.c:84
 gtk_css_static_style_compute_value (style=0x1e7c320, provider=0x0, parent_style=0x0, id=3, specified=0x7f53258b9b20 <inherit>, section=0x0) at ../../../../gtk/gtkcssstaticstyle.c:237
 _gtk_css_lookup_resolve (lookup=lookup@entry=0x1e7e790, provider=provider@entry=0x0, style=style@entry=0x1e7c320, parent_style=parent_style@entry=0x0) at ../../../../gtk/gtkcsslookup.c:122
 gtk_css_static_style_new_compute (provider=provider@entry=0x0, matcher=matcher@entry=0x0, parent=parent@entry=0x0) at ../../../../gtk/gtkcssstaticstyle.c:195