[MacRuby-devel] [MacRuby] #816: Assertion fails on multi-threaded code

29 Jul 2010


      #816: Assertion fails on multi-threaded code
------------------------------+---------------------------------------------
 Reporter:  mootoh@…          |       Owner:  lsansonetti@…        
     Type:  defect            |      Status:  new                  
 Priority:  minor             |   Milestone:                       
Component:  MacRuby           |    Keywords:                       
------------------------------+---------------------------------------------
 I tried the following simple multi-threaded code snippet on MacRuby 0.6
 (release build, obtained from http://www.macruby.org/downloads.html,
 universal-darwin10.0, x86_64), and it aborted with following assertion:

 {{{
 Assertion failed: ((b->flags & flags) == flags), function
 rb_vm_prepare_block, file dispatcher.cpp, line 1773.
 }}}

 Code snippet to reproduce this issue:

 {{{
 N=2
 M=1000000

 def compute_intensive n
    r = 0
    M.times do |i|
       M.times do |j|
          r = i * j + n
       end
    end
    r
 end

 threads = []

 N.times do |i|
    th = Thread.new do
       compute_intensive i
    end
    threads.push th
 end

 threads.each { |thread| thread.join }
 }}}

 I tried both ruby 1.8.7 (2009-06-12 patchlevel 174) and ruby 1.9.2dev
 (2009-08-30 trunk 24718), and those produced no error.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/816>
MacRuby <http://macruby.org/>