[Lazarus] Gtk2 runtime error on terminal

[AlexeyT]

Ubuntu 19.10 x64, Lazarus trunk

If I run "./cudatext dd.erb" with not installed lexer ERB, CudaText runs 
Python plugin to detect lexer for dd.erb, and shows menu-like dialog 
with such a lexer. It runs ok. and it prints to terminal such line

(cudatext:12080) Gtk-CRITICAL **: x.x.x.x: gtk_window_realize_icon: 
assertion 'info->icon_pixmap == NULL' failed


-- 
Regards,
Alexey