mode-lambda example doesn't work?

"'John Clements' via users-redirect" <[email protected]> Wed, 06 Apr 2016 00:01:41 -0400

Newsgroups	gmane.comp.lang.racket.user,gmane.lisp.scheme.plt
Message-ID	<[email protected]>

I want a sprite library, and it looks like mode-lambda is the obvious choice. However, when I try to run the “one.rkt” example that’s a part of mode-lambda, I get a screen with no motion that looks a bit like garbage (though with live frame rate figures), and this text in the definitions window:

Welcome to DrRacket, version 6.4.0.15--2016-03-29(-/f) [3m].
Language: racket/base, with debugging; memory limit: 512 MB.
You are using OpenGL (4 1)
'#(#(416.0 234.0) #(1.0 1.0) #(416.0 234.0) #(416.0 234.0) #(800.0 578.0))
. . ../backend/gl.rkt:281:9: OpenGL error in procedure glClear: Error code 1286.

Any idea what’s going on? I’m assuming this isn’t the intended behavior. This is on a "MacBook Pro (Retina, 13-inch, Early 2015)", running OS X 10.11.4 with a "Intel Iris Graphics 6100 1536 MB” card.

John

Here’s a screenshot of what I see in the opened window:


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