[squeak-dev] strange bug in squeak 4.2 & 4.3 alpha running Cog,
MTCog and regular VMs on a Mac
lenglish5 at cox.net
Tue Sep 6 02:44:51 UTC 2011
When I run the following code, I start to get MNU:
The errors show up with Intel Macs running Mac OS X 19.6.8 using Squeak
4.2 all-in-one, Cog with Squeak4.2-10966 and CogMT2489 and Cog2489 with
both Squeak 4.3alpha-11314 and Squeak4.3alpha11636.
In order to get the errors open Squeak, open a workspace and transcript
and paste teh above code into the workspace. Select the part above the
"++++++++...+++++++" and do-it
then select the part within the two comments (myGrid delete. Smalltalk
garbageCollect) and do-it.
then iterate manually with i = 2 through 10 and evaluate the lower half
of the code (below the comments)
Eventually you get one or more MNU: UndefinedObject>>containsPoint errors
When I do THIS code: http://pastebin.com/Mp0aZLUj
the errors seem to go away, but the overhead of the 1000+ GC calls is
way too much.
Suggestions? I was testing to see if I could prototype a 2D shooter in
Squeak using morphs for the bitmaps when the bug showed up.
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