From: lxh37@...
Date: 2014-08-21T14:54:56+00:00
Subject: [ruby-core:64489] [ruby-trunk - Bug #10133] Bug in ruby

Issue #10133 has been updated by Liz Huang.



I used fiddle in my Ruby script and it works! but when I use it in the same way 
on Ruby On Rails, it crashed. I pasted the codes below and you can see the codes
are exactly the same. I am not sure if it is fiddle.

Ruby script which works:

class Samplesize

  require 'fiddle/import'

  module Libm
    extend Fiddle::Importer
    dlload '/Library/WebServer/smart/lib/libsamplesize.dylib'
    extern 'long Calculate(long, double, double, char*)'
  end

  
  def compute

  require 'fiddle'
      errmsg ="                                                                     "  
      puts Libm.Calculate( 1000, 0.2, 0.9, errmsg)
  end

end

Samplesize_controller.rb on Ruby On Rails that crashes when call "Libm.Calculate()".

class SamplesizeController < ApplicationController

  require 'fiddle/import'

  module Libm
    extend Fiddle::Importer
    dlload '/Library/WebServer/smart/lib/libsamplesize.dylib'
    extern 'long Calculate(long, double, double, char*)'
  end

  def index
  end

  def progress
    # session[:sigma_sq] = params[:sigma_sq].to_f
    session[:delta] = params[:delta].to_f
    session[:conf] = params[:conf].to_f
    session[:nmax] = params[:nmax].to_i
    redirect_to :action => "compute"
  end
  
  def compute

  require 'fiddle'
    if ( session[:delta] < 0.0 ) || ( session[:delta] > 1.0 )
      session[:errmsg] = "The value of delta must be between 0 and 1."
      session[:n] = -1
    elsif ( session[:conf] < 0.0 ) || ( session[:conf] > 1.0 )
      session[:errmsg] = "The value of conf must be between 0 and 1."
      session[:n] = -1
    elsif ( session[:nmax] < 0.0 )
      session[:errmsg] = "The value of nmax must be positive."
      session[:n] = -1
    else

      errmsg ="                                                                     "  
      resultn= Libm.Calculate(1000,0.2,0.9, errmsg)
      session[:n] = resultn
    end
    redirect_to :action => "results"
  end

  def results
    # @sigma_sq = session[:sigma_sq]
    @delta = session[:delta]
    @conf = session[:conf]
    @nmax = session[:nmax]
    @n = session[:n]
    @errmsg = session[:errmsg]
  end

  def start_over
    reset_session
    redirect_to :action => "index"
  end
end


----------------------------------------
Bug #10133: Bug in ruby
https://bugs.ruby-lang.org/issues/10133#change-48436

* Author: Liz Huang
* Status: Third Party's Issue
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: 2.1.0p0 (2013-12-25 revision 44422
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------

I got a new Mac Pro server and tried to upgrade web applets to new version of Ruby On Rails, the web applet calls an external Fortran library I developed, it worked in Ruby on Rails (Ruby 1.8.7 and Rails 2.3.18) by using "DL". I tried to develop the same web applet in Ruby on Rails 4 (ruby 2.1.0p0 (2013-12-25 revision 44422) and Rails 4.1.2), with "DL" deprecated, so I use fiddle and wrapped Fortran by C, I tested the interface by commenting out all computation parts first to make sure it is working. Now I have the computation codes back (same codes as in older version) and I even create a console application to test the code is working. But when I try to call it from Ruby, it crashed.
I saved all messages in terminal window in attached file "bug.rtf" and also send the crash report.
I feel it might a bug in Ruby as it works in older version and the Fortran codes was tested in console application project. 

---Files--------------------------------
bug.rtf (125 KB)
ruby_2014-08-14-162519_calder229.crash (25 KB)
DiagnosticReports.zip (1.21 MB)
calculateSamplesize.rb (454 Bytes)
libsamplesize.dylib (1.78 MB)
ruby_2014-08-20-153628_calder229.crash (26.3 KB)


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