Ticket #1 (new defect)
My UArr code looks like it's reading uninitialized memory?
|Reported by:||pumpkingod@…||Owned by:||somebody|
I'm parsing in a reasonably large data file (I've included a smaller one that still exhibits the problem) in CSV format, replacing all NaNs? with 0, and then proceeding to calculate a sliding window mean over the columns of the data. The data has no NaNs? in it, so there's no reason for any of the means to be NaN/e308, and definitely no reason to see changes between runs of the program (unless I'm doing something very wrong!).
I compile with ghc -O2 --make -o minimal minimal.hs and run with ./minimal. The data files used are in data, and the program relies on current path so run it from the parent folder of data.
See the two_runs file for an example of what I get from two successive runs of the program, with nothing else in between. The data files don't ever change.
I'm compiling on GHC 6.10.1 (the 32-bit package from haskell.org) on Mac OS 10.5.
My code and data are at http://pumpkinpat.ch/uvector_bug.tbz .