Bug #11615: Forwardable fails to adjust backtrace when Exception is defined in the target class

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[shugo (Shugo Maeda)]

Forwardable fails to adjust backtrace when Exception is defined in the target class as follows:

$ cat t.rb
require "forwardable"

class Foo
  extend Forwardable

  def_delegator :bar, :baz

  class Exception
  end
end

Foo.new.baz
$ ruby t.rb
/home/shugo/local/lib/ruby/2.3.0/forwardable.rb:183:in `baz': undefined local variable or method `bar' for #<Foo:0x007fe48a6e65b0> (NameError)
Did you mean?  baz
	from t.rb:12:in `<main>'

Without the definition of Foo::Exception, backtrace is shown as follows:

$ ruby t.rb
t.rb:12:in `<main>': undefined local variable or method `bar' for #<Foo:0x007f455d9d1c38> (NameError)
Did you mean?  baz

[shugo (Shugo Maeda)]

• Status changed from Open to Closed

Applied in changeset r52249.

---

• lib/forwardable (def_instance_delegator, def_single_delegator):
  rescue ::Exception instead of Exception in case Exception is
  defined under the target class.
  [ruby-core:71175] [Ruby trunk - Bug #11615]