Do not report internal error for invalid code with nested generics
Do not report internal error for invalid code with nested generics

Reported-by: Matthias Berndt <46c35cff6162aa146acfbe262b35a4e1611b24ef@gmx.de>

frida/vala,frida/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,GNOME/vala,frida/vala,GNOME/vala