Bug #12072: SortedSet#superset? raises NoMethodError if rbtree is installed

• Status: Closed
• Assignee: knu (Akinori MUSHA)
• Target version: -
• ruby -v: ruby 2.4.0dev (2016-02-14 trunk 53823) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[rhenium (Kazuki Yamaguchi)]

If rbtree is installed, the following code doesn't work.

require "set"

set_a = SortedSet.new([1, 2])
set_b = SortedSet.new([1, 2, 3])

p set_a >= set_b
# /home/k/.rbenv/versions/trunk/lib/ruby/2.4.0/set.rb:223:in `superset?': undefined method `>=' for #<RBTree: {1=>true, 2=>true}, default=nil, cmp_proc=nil> (NoMethodError)
# 	from test.rb:6:in `<main>'

I attached a patch for this.

[yui-knk (Kaneko Yuichiro)]

• Status changed from Open to Assigned
• Assignee set to knu (Akinori MUSHA)

Same code doesn't work on Ruby 2.3.0, because the cause of this bug is r52586.

[knu (Akinori MUSHA)]

• Status changed from Assigned to Closed

Applied in changeset trunk|r60312.

---

Fix comparison methods of Set to check if @hash is actually comparable

This should fix comparison of rbtree backed SortedSet instances.
[Bug #12072]