I get a weird behavior when using bitwise-ior and bitwise-and with large
numbers. Tested on 2 machines (racket 6.6, Ubuntu 16.04 and 14.04):
Here is the test example:
(define num #xffffffffffffffff) ;; remove one f, and the results are fine
in both cases
(for ([i 5])
(printf "~a~n" (bitwise-ior (bitwise-and num -2) 0)))
When run from DrRacket using ctr+r, it works properly:
When pasted into DrRacket's REPL (or run from command line via "racket
random-bug.rkt"), the code does not only produce wrong result, but also
seems to be counting something :)
Removing one "f" from the test number results in correct behavior in both
Very large numbers are are reduced to the same range (around 54 bits).
Replacing the expression (bitwise-and num -2) by the corresponding number
it computes results in correct behavior.
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