Bug#496187: ruby: a comment makes code behave differently

[Michal Suchanek]

Package: ruby
Version: 4.2
Severity: normal


The attached code fails after about 100 iterations of invoking popen.

However, on this particular interpreter version inserting a comment into
the code makes it not fail.

On stable the code fails regardless of comment.


-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.25-2-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages ruby depends on:
ii  ruby1.8                       1.8.7.22-3 Interpreter of object-oriented scr

ruby recommends no packages.

ruby suggests no packages.

-- debconf-show failed

def try_analyze *words
 analyzer = IO.popen( 'cat', IO::RDWR )
 res = []

 t = Thread.new(  (IO::for_fd analyzer.fileno),res){|fd,ary|
   #comment
   while l = fd.gets do
     STDERR.putc 8
     ary.push l
   end
   fd.close rescue nil # hopefully prevents zombie hordes
 }

 words.each{|w|
   STDERR.putc '.'[0]
   analyzer.puts w
 }

 analyzer.close_write rescue nil
 t.join
end

1.upto(1000){|_|
 try_analyze *%w(a b c d e f g h i)
 STDERR.puts _
}