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bug#14879: fixnum-width, greatest-fixnum and least-fixnum disagree
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From: |
Mark H Weaver |
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Subject: |
bug#14879: fixnum-width, greatest-fixnum and least-fixnum disagree |
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Date: |
Tue, 16 Jul 2013 17:41:41 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Göran Weinholt <address@hidden> writes:
> scheme@(guile-user)> (import (rnrs))
> scheme@(guile-user)> (fixnum-width)
> $1 = 61
> scheme@(guile-user)> (greatest-fixnum)
> $2 = 2305843009213693951
> scheme@(guile-user)> (least-fixnum)
> $3 = -2305843009213693952
>
> If the reported fixnum width is correct, then these should be the least
> and greatest fixnums:
>
> (- (expt 2 (- (fixnum-width) 1))) => -1152921504606846976
> (- (expt 2 (- (fixnum-width) 1)) 1) => 1152921504606846975
>
> If the reported least and greatest fixnums are correct, then the fixnum
> width is actually 62.
That's correct. Fixed in 06903786211afd9a554b8f009a37111f729607ee.
Thanks!
Mark