Bug #11640: [PATHC] Sometime `NameError#message` raises `ArgumentError: malformed format string - %$`

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-10-30 trunk 52371) [x86_64-darwin14]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[yui-knk (Kaneko Yuichiro)]

  def test_message_of_name_error
    begin
      Module.new do
        module_function :foo
      end
    rescue => e
      error = e
    end

    assert_match /\Aundefined method `foo' for module `#<Module:.*>'\z/, error.message
  end

# =>

TestException#test_name_error:
ArgumentError: malformed format string - %$
    /Users/yuichirokaneko/ruby/ruby/test/ruby/test_exception.rb:734:in `to_str'
    /Users/yuichirokaneko/ruby/ruby/test/ruby/test_exception.rb:734:in `to_s'
    /Users/yuichirokaneko/ruby/ruby/test/ruby/test_exception.rb:734:in `message'
    /Users/yuichirokaneko/ruby/ruby/test/ruby/test_exception.rb:734:in `test_name_error'

I send PR.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset r52400.

---

eval_error.c: Fix a format of NameError#message

• eval_error.c (undef_mesg_for): fix typo. Before this commit
  ArgumentError: malformed format string - %$ was raised when
  NameError#message is called. [ruby-core:71282] [Bug #11640]
  [Fix GH-1077]