From: "pypypy567 (py _)" <redmine@...>
Date: 2013-02-04T00:28:23+09:00
Subject: [ruby-core:51826] [ruby-trunk - Bug #7777][Open] wrong use of "Raise" method in matrix.rb


Issue #7777 has been reported by pypypy567 (py _).

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Bug #7777: wrong use of "Raise" method in matrix.rb
https://bugs.ruby-lang.org/issues/7777

Author: pypypy567 (py _)
Status: Open
Priority: Normal
Assignee: marcandre (Marc-Andre Lafortune)
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2013-01-07) [i386-mswin32_100]


=begin
"Raise" method added by e2mmap library shows customized error messages according to pre-registered formats:

  $ irb
  irb(main):001:0> require 'matrix'
  => true
  irb(main):002:0> Matrix.Raise ArgumentError, 2, 3 rescue $!
  => #<ArgumentError: Wrong # of arguments(2 for 3)>

However it's not needed if we make messages by hand.

  irb(main):003:0> Matrix.Raise ArgumentError, "One size must be 0"
  ArgumentError: invalid value for Integer(): "One size must be 0"
          from C:/ruby200/lib/ruby/2.0.0/e2mmap.rb:144:in `sprintf'
          from C:/ruby200/lib/ruby/2.0.0/e2mmap.rb:144:in `Raise'
          from C:/ruby200/lib/ruby/2.0.0/e2mmap.rb:78:in `Raise'
          from (irb):3
          from C:/ruby200/bin/irb.bat:19:in `<main>'
  irb(main):004:0> raise ArgumentError, "One size must be 0" rescue $!
  => #<ArgumentError: One size must be 0>
=end


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