Bug#793934: some icons of menus in retext can't show normally

[duck]

Coin,

I just installed 5.2.1 for the first time and the described problem 
shows, see attached screenshot.

I've got the following messages in my terminal:
Using configuration file: /home/duck/.config/ReText project/ReText.conf
setNativeLocks failed: Resource temporarily unavailable
setNativeLocks failed: Resource temporarily unavailable
setNativeLocks failed: Resource temporarily unavailable
QXcbWindow: Unhandled client message: "_GTK_LOAD_ICONTHEMES"
QXcbWindow: Unhandled client message: "_GTK_LOAD_ICONTHEMES"
QXcbWindow: Unhandled client message: "_GTK_LOAD_ICONTHEMES"

Regards.

--
Marc Dequènes