From: Tanaka Akira <akr@...>
Date: 2007-08-16T11:43:34+09:00
Subject: [ruby-dev:31434] LP64: -0x10000000000000001 << -0x80000001

LP64 環境で、-0x10000000000000001 << -0x80000001 が
RangeError になります。

% ./ruby -ve 'p(-0x10000000000000001 << -0x80000001)'
ruby 1.9.0 (2007-08-16 patchlevel 0) [x86_64-freebsd6.2]
-e:1:in `<<': integer -2147483649 too small to convert to `int' (RangeError)
        from -e:1:in `<main>'

あと、-3 << -0x4000000000000001 が -2 になります。

% ./ruby -ve 'p(-3 << -0x4000000000000001)'
ruby 1.9.0 (2007-08-16 patchlevel 0) [x86_64-freebsd6.2]
-2
-- 
[田中 哲][たなか あきら][Tanaka Akira]