Bug #9939: segfault by modifying array during Array#combination

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: 2.2.0
• ruby -v: r46416
• Backport: 2.0.0: DONE, 2.1: DONE

[nobu (Nobuyoshi Nakada)]

$ ruby -e 'a = [*0..500]' -e 'a.combination(2) {|*,x| a.clear}'
-e:2: [BUG] Segmentation fault at 0x00000000000000

[nobu (Nobuyoshi Nakada)]

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

Applied in changeset r46418.

---

array.c: combination on a shared copy

• array.c (rb_ary_combination): iterate on a shared copy, and use
  array of indexes instead of array of chosen objects.
  [ruby-core:63149] [Bug #9939]

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED to 2.0.0: REQUIRED, 2.1: DONE

r46417 and r46418 were backported into ruby_2_1 branch at r46808.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.0.0: REQUIRED, 2.1: DONE to 2.0.0: DONE, 2.1: DONE

backported into ruby_2_0_0 at r47332.