Hi everybody, I am experiencing a very weird behavior with Arrays : I writed a test case as follows ; testChange | bitArray1 | bitArray1 := #(0 0 0 0). (1 to: bitArray1 size) do: [ :index ||temp| temp := (bitArray1 at: index) + 1. bitArray1 at: index put: (temp). ]. self assert: bitArray1 = #(1 1 1 1) The thing is that the test succedes the first time but if I run it again it fails.Moreover, if  I change the testChange arbitrarily (just add a space and save) the test succeeds the first time then it fails.....etc. Actually bitArray1 := #(0 0 0 0) changes the value of bitArray1 in the first run but then bitArray1 does not change any more in the next runs. The problem does not occur if  I replace bitArray1 := #(0 0 0 0). with bitArray1 := Array new:4 withAll: 0 . Any idea where the problem can be?Should I open a bug entry? where? Abdelghani