Hi,
while I was working with Nile (a new stream library) the VM crashed.
You can reproduce it very easily. Download a fresh 3.9-7067, install Nile-All from monticello (http://www.squeaksource.com/Nile/).
In a workspace, execute: "NSBenchmarks new benchStringNextPutAllString"
Then, you get:
sweep failed to find exact end of memory
-2145977416 >new: -2145977508 NSStringWriter>nextPutAll: -2145977600 [] in NSBenchmarks>benchStringNextPutAllString -2145977692 Integer>timesRepeat: 2030103240 [] in NSBenchmarks>benchStringNextPutAllString 2030103424 [] in NSBenchmarks>benchWithSqueakStream:andNileStream:do: -2145996892 BlockContext>bench 2030103644 [] in NSBenchmarks>benchSqueak:Nile: 2030103060 Integer>timesRepeat: 2030102968 NSBenchmarks>benchSqueak:Nile: 2030102876 NSBenchmarks>benchWithSqueakStream:andNileStream:do: 2030102784 NSBenchmarks>benchStringNextPutAllString 2030102692 UndefinedObject>? 2030100224 Compiler>evaluate:in:to:notifying:ifFail:logged: 2030099892 [] in ParagraphEditor>evaluateSelection 2030099792 BlockContext>on:do: ...