From: Simon Strandgaard <neoneye@...>
Date: 2004-04-17T21:29:09+09:00
Subject: [1.9-16apr] $0 is messed up

I have just upgraded to 1.9 16-apr-2004 from 1.9 7-apr-2004.

One of my testsuites is no longer working, which worked
with the previous version. It shows up that $0 is cluttered
up.

I have placed a 'p' statement before the place where I
read $0. It outputs

"test_engine_builtin.rb\000test_rubicon(XTestEngineBuiltin)"

The /\000.*$/ shouldn't be there. 
The code looks like

def test_rubicon
  file_name = nil
  p $0
  start = File.dirname($0)  # BOOM null is not understood.
  for base in [".", "language"] 


In the changelog there seems to have been many changes 
recently to the dir handling. I wonder if that could be 
the reason?


I tried to make a small piece of code which could reproduce 
the problem. But the problem seems only to be provoked when I do
a test_all. 

server> ruby a.rb 
"a.rb"
server> cat a.rb 
require 'b'
class C
  include M
end
C.new.m
server> cat b.rb 
module M
  def m
    p $0
  end
end
server>


Today is devoted to make a working proof of concept, which
_can_ provoke the problem. Though I hope someone is able to 
recognize the problem before then. 

--
Simon Strandgaard