Hi, greetings!

I was trying out some examples from the Pharo By Example book on the latest development version of Pharo, and I wanted to create a stand-alone window for a simple game on Ubuntu. So I found out the openInExternalWindow method, the window appears but I get this error that I couldn't understand, and could not find any reference to it online. So I'm not sure if it's a bug.

The simplest way I found to reproduce it was:

'Hello' asMorph openInExternalWindow.

I'm using Pharo 7 on Ubuntu 17.10.

A copy of the stack:

ByteArray(Object)>>primitiveFailed:
ByteArray(Object)>>primitiveFailed
ByteArray>>integerAt:size:signed:
ByteArray>>unsignedLongAt:
SDL_KeyDownEvent>>windowID
OSSDL2Driver>>convertEvent:
[ event := self convertEvent: sdlEvent.
event ifNotNil: [ eventQueue nextPut: event ] ] in OSSDL2Driver>>processEvent: in Block: [ event := self convertEvent: sdlEvent....
BlockClosure>>on:do:
OSSDL2Driver>>processEvent:
OSSDL2Driver>>eventLoopProcessWithoutPlugin
[ self eventLoopProcessWithoutPlugin ] in OSSDL2Driver>>setupEventLoop in Block: [ self eventLoopProcessWithoutPlugin ]
[ self value.
Processor terminateActive ] in BlockClosure>>newProcess in Block: [ self value....

But it seems incomplete. Any more information I can provide?

Thank you.