|
| From: | Mark H Weaver |
| Subject: | bug#21901: bit shift wrong on maximal right shift |
| Date: | Sun, 14 Oct 2018 05:40:51 -0400 |
| User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
Zefram <address@hidden> writes:
> With Guile 2.0.11:
>
> scheme@(guile-user)> (ash 123 (ash -1 63))
> $1 = 123
>
> Correct result would of course be zero. Problem only occurs for
> exactly this shift distance: one bit less produces the right answer.
Nice catch!
It's finally fixed in commit 1990aa916382d0afcebd5315a6d6f555949ff654 on
the stable-2.2 branch. The fix will be in Guile 2.2.5.
Thanks for the report.
Mark
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