Bug #8010: Enumerator#with_index(large_number)

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.1.0dev (2013-03-04 trunk 39580) [x86_64-linux]

[znz (Kazuhiro NISHIYAMA)]

Enumerator#with_index の引数で大きな数を指定するとマイナスになったり例外になったりするのはバグでしょうか?

% ruby -ve 'p 3.times.with_index(1<<61).to_a'
ruby 2.1.0dev (2013-03-04 trunk 39580) [x86_64-linux]
[[0, 2305843009213693952], [1, 2305843009213693953], [2, 2305843009213693954]]
% ruby -ve 'p 3.times.with_index(1<<62).to_a'
ruby 2.1.0dev (2013-03-04 trunk 39580) [x86_64-linux]
[[0, -4611686018427387904], [1, -4611686018427387903], [2, -4611686018427387902]]
% ruby -ve 'p 3.times.with_index(1<<63).to_a'
ruby 2.1.0dev (2013-03-04 trunk 39580) [x86_64-linux]
-e:1:in with_index': bignum too big to convert into long' (RangeError)
from -e:1:in each' from -e:1:in to_a'
from -e:1:in `'

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r39594.
Kazuhiro, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

enumerator.c: allow Bignum for with_index

• enumerator.c (enumerator_with_index_i): allow Bignum as offset, to
  get rid of conversion exception and integer overflow.
  [ruby-dev:47131] [Bug #8010]

[nagachika (Tomoyuki Chikanaga)]

r39594 and r39596 were backported to ruby_2_0_0 branch at 43960.

[usa (Usaku NAKAMURA)]

backported into ruby_1_9_3 at r44744.