[fpc-pascal] TOpenGLControl segfaults on re-parenting

[denisgolovan]

Hi all

I experience various random segfaults when trying to change Parent for TOpenGLControl.
Unfortunately it happens rather randomly. 
Sometimes it happens deep in GTK code, sometimes when GL context destroys.

I am under Linux + GTK-2.24.32 + Mesa 19.0.1 (amdgpu driver).

Does anybody experience the same?

-- 
Regards,
Denis Golovan