fxbit-set? has a new definition

Bug #886314 reported by Göran Weinholt on 2011-11-04
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ikarus Scheme
Undecided
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Bug Description

The errata for R6RS corrects the definition of fxbit-set? in this way:

#|
In the specification of fxbit-set?, the sentence

"Fx2 must be non-negative and less than (fixnum-width)."
should be replaced by

"Fx2 must be non-negative."
Also, the code describing its computation should be changed to:

(if (fx>= fx2 (fx- (fixnum-width) 1))
    (fxnegative? fx1)
    (not
      (fxzero?
         (fxand fx1
                (fxarithmetic-shift-left 1 fx2)))))
|#

Ikarus still uses the old definition and raises an exception if fx2 is (fixnum-width) or greater.

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