Bug #11035: Calling #hash method: inconsistency between dynamic and static symbols

• Status: Closed
• Assignee: matz (Yukihiro Matsumoto)
• Target version: -
• ruby -v: 2.3dev
• Backport: 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

[ko1 (Koichi Sasada)]

There is an inconsistency between static symbols and dynamic symbols.

class Symbol
  def hash
    raise
  end
end

h = {}
h[:foo] = 1          #=> no problem
h['bar'.to_sym] = 2  #=> unhandled exception

I think it should be same behavior.
My favorite is skip calling #hash for all Symbol objects.

[nobu (Nobuyoshi Nakada)]

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

Applied in changeset r50182.

---

hash.c: compare symbols by identities

• hash.c (rb_any_hash): Symbols are compared by the identities
  always. [ruby-core:68767] [Bug #11035]

[usa (Usaku NAKAMURA)]

• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: REQUIRED to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONE

Backported into ruby_2_2 branch at rr50620.